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06/05/2020

Paramecium with Contractile Vacuoles

Light microscope view of paramecium showing contractile vacuoles. Contractile vacuoles are a specialized vacuole (membrane bound organelle/compartment) that regulates the amount of water inside a cell. In freshwater, the concentration of solutes is hypotonic (higher inside than outside the cell) and under these conditions, osmosis causes water to accumulate in the cell from the external environment. The contractile vacuoles acts as part of a protective mechanism that prevents the cell from absorbing too much water and bursting from the increased internal pressure. The water collection by the vacuole and water expulsion of the contractile vacuole occur at regular intervals. One cycle can take several seconds, depending on the species and the environment's osmolarity.

© BioMEDIA Associates / Science Source

ScienceSource.com image ID# SS261657

#paramecium #protozoa #protozoan #ciliate #contractile #vacuole #contractilevacuole #vacuoles #contractilevacuolex #organelle #organelles #microscopy #lightmicroscopy #science #biology #pondlife #microbiology #alwsyslearning #scienceteacher #biologyteacher #sciencevideo #stockvideo #cell #cells #singlecell #homeschoolscience #homeschool

Graafian Follicle... where the egg develops in the ovary before ovulationLight micrograph of a mature mammalian Graafian...
06/05/2020

Graafian Follicle... where the egg develops in the ovary before ovulation

Light micrograph of a mature mammalian Graafian (or ovarian) follicle. A mature follicle in an ovary contains a liquid-filled cavity that ruptures during ovulation to release an egg. The Graafian follicle has a large antrum (large fluid filled area) that makes up most of the follicle. The secondary oocyte is located off-center in the antrum. The egg cell is surrounded by the zona pellucida and a layer of several cells known as the corona radiata. After rupturing and releasing the egg, the follicle is turned into a corpus luteum (a temporary endocrine structure that produces relatively high levels of progesterone). Horizontal Field of View = 1050um

© M.I. Walker/Science Source

ScienceSource.com image ID# SS21809073

#ovarian #ovary #follicle #ovarianfollicle #graafian #graffianfollicle #histology #reproduction #reproductivesystem #ovulation #corpusluteum #egg #humanegg #ovulating #atrum #zonapellucida #coronaradiata #premed #science #scienceteacher #alwayslearning #biologyteacher #homeschoolscience #histology #sciart #scienceart #lightmicroscopy #microscopy #stockphoto #stockphotography

Tiger BeetleThe Tiger Beetle (Cicindela aurelenta) is known for its aggressiveness and fast running speed. Thisspecies o...
06/05/2020

Tiger Beetle

The Tiger Beetle (Cicindela aurelenta) is known for its aggressiveness and fast running speed. This
species of tiger beetle has dark red, green, blue, yellow and brown metallic colors, and six white dots
on the elytra (the hardened forewing of beetles). It has fierce mandibles, but is rarely reported to bite humans. Marco Photography.
Magnification ratio 3:1.

© Danny Radius/Science Source

ScienceSource.com image ID# SS22617504

#beetle #tigerbeetle #beetles #tigerbeetles #insects #insect #mandible #mandibles #cicindelaaurelenta #cicindela #metallic #metalliccolors #beetlesofinstagram #macro #macrophotography #insectsofinstagram #alwayslearning #science #biology #nature #wildlife #dero #derpface #sciart #scienceart #stockphoto #stockphotgraphy

Human Epiglottis... the flap that keeps you from breathing in your food.Very low magnification showing a sagittal sectio...
06/05/2020

Human Epiglottis... the flap that keeps you from breathing in your food.

Very low magnification showing a sagittal section of a human epiglottis. The lingual surface, lined by malpigian epithelium, is facing up. The laryngeal side, with respiratory epithelium and glands, is down. The epiglottis is a leaf-shaped flap in the throat that prevents food from entering the windpipe and the lungs. It is open during breathing, allowing air into the larynx. During swallowing, it closes to prevent aspiration (inhalation) of food into the lungs and directs the swallowed liquids or food to go along the esophagus toward the stomach instead.

© Jose Luis Calvo/Science Source

ScienceSource.com image ID# SS21897179

#epiglottis #epithelium #epithelial #aspiration #inhalation #swallowing #swallow #esophagus #respiratorysystem #digestivesystem #flap #mouth #larynx #trachea #histology #science #biology #scienceteacher #biologyteacher #premed #emt #microscopy #lightmicroscopy #sciart #scienceart #stockphoto #stockphotography

Capillary Network in MuscleLight microscope image of striated muscle from mammal. The blood vessels/capillaries were inj...
06/05/2020

Capillary Network in Muscle

Light microscope image of striated muscle from mammal. The blood vessels/capillaries were injected with colored gelatin. The sample of muscle was then teased apart to show capillary network. Blue/Lime bicolor polarizer. Horizontal Field of View = 900um

© M.I. Waller/Science Source

ScienceSource.com image ID# SS21814388

#muscle #capillaries #capillary #muscles #musclefiber #musclefibers #musclecells #musclecell #capillarynetwork #circulatorysystem #legday #armday #lightmicrscopy #lightmicroscope #microscopy #alwayslearning #science #scienceteacher #biology #biologyteacher #homeschoolscience #sciart #scienceart #nerddecor #histology #polarized #stockphoto #stockphotography

Mutant Fly!!!Scanning Electron Micrograph (SEM) of the head of a mutant fruit fly (Drosophila melanogaster). This mutant...
06/04/2020

Mutant Fly!!!

Scanning Electron Micrograph (SEM) of the head of a mutant fruit fly (Drosophila melanogaster). This mutant has abnormal head parts due to the Antp mutation (also known as Antennapedia Mutation). Fruit flies are widely used in genetic experiments, particularly in mutation experiments, because they reproduce rapidly and their genetic systems are well understood.

Antennapedia (abbreviated Antp) is a Hox gene which control the formation of legs during development. Mutations of this gene can result in either the development of the second leg pair into ectopic antennae or separately convert antennae into ectopic legs (as in this image). Hox genes are a group of related genes that specify regions of the body plan of an embryo along the head-tail axis of animals. They encode and specify the characteristics of "position", ensuring that the correct structures form in the correct places of the body.

© Ted Kinsman / Science Source

ScienceSource.com image ID# SS2259202

#fly #fruitfly #mutation #mutant #mutations #mutants #antp #antennapedia #drosophila #drosophilamelanogaster #insect #insects #entomology #entomologist #sem #scanningelectronmicroscopy #microscopy #sciart #scienceart #alwayslearning #scienceteacher #science #homeschoolscience #derp #derpface #biology #biologyteacher #stockphoto #stockphotography

It's like seeing into you sole...Plantar skin, LMLight microscope image of human plantar skin showing full thickness.  P...
06/04/2020

It's like seeing into you sole...

Plantar skin, LM

Light microscope image of human plantar skin showing full thickness. Plantar skin is the thick skin that covers the soles of the feet of humans and other primates. The three main layers are seen... the epidermis (top), dermis (middle), and hypodermis (bottom). The sample is stained with Hematoxylin and Orange G. Hematoxylin stains the cell nuclei blue while the Orange G stains keratin (fibrous structural protein). Magnification is 150x at 10 cm wide.

Alvin Telser/Science Source

ScienceSource.com image ID# SS2779731

#skin #plantar #plantarskin #integumentary #integumentarysystem #micrograph #microscopy #sciart #scienceart #lightmicroscope #alwayslearning #lightmicroscopy #dermatology #dermatologist #premed #scienceteacher #biologyteacher #homeschoolscience #dermis #epidermis #hypodermis #hematoxylin #orangegstain #sole #soul #histology #keratin #healthyskin #stockphoto #stockphotography

https://www.sciencesource.com/archive/Plantar-skin--LM-SS2779731.html

Eye of Sauron?Spinal Cord CellSpinal cord, touch preparation (light micrograph). A touch preparation is performed at by ...
06/03/2020

Eye of Sauron?

Spinal Cord Cell

Spinal cord, touch preparation (light micrograph). A touch preparation is performed at by gently smearing the bottom of a biopsy specimen on a glass slide. Hematoxylin and eosin stain (H&E) was used which is the most widely used stain in medical diagnosis. The hematoxylin stains cell nuclei blue and eosin stains the extracellular matrix and cytoplasm pink.

© Alvin Telser / Science Source

ScienceSource.com image ID# SS2773777

#spinalcord #spinal #cell #cells #nerve #neuron #nerves #neurons #hestain #handestain #lightmicroscope #lightmicrograph #microscopy #histology #pathology #hematoxylineosin #hematoxylin #eosin #premed #futuredoctor #homeschoolscience #biologyteacher #biology #scienceteacher #stain #stained #sauron #eyeofsauron #stockphoto #stockphotography #sciart #scienceart #alienlife

Science Source Images's cover photo
06/03/2020

Science Source Images's cover photo

Title: Taro Leaf in Cross Section (SEM)Color enhanced scanning electron micrograph (SEM) of a section through a taro lea...
06/03/2020

Title: Taro Leaf in Cross Section (SEM)

Color enhanced scanning electron micrograph (SEM) of a section through a taro leaf (Colocasia esculenta). The outer layers (epidermis) of the leaf are made up of circular cells. The leaf interior contains palisade mesophyll (bright green) and spongy mesophyll (yellow). The palisade cells contain chloroplasts, sites of photosynthesis. At left is a vascular bundle (grey) made up of xylem and phloem vessels, which transport water, nutrients and hormones around the plant. Magnification: x200 when printed at 10 centimeters wide.

© Eye of Science/Science Source

ScienceSource.com image ID# SS2447178

#taro #colocasia #colocasiaesculenta #plant #plants #plantlovers #plantanatomy #plantsofinstagram #epidermis #taroleaf #palisademespphyll #mesophyll #spongymesophyll #palisadecells #chloroplast #chloroplasts #photosynthesis #vascularbundle #xylem #phloem #botany #botanist #sem #biologyteacher #biology #scanningelectronmicroscopy #microscopy #sciart #scienceart #alwayslearning #scienceteacher #science #homeschoolscience #stockphoto #stockphotography

It looks like something out of a science fiction movie... but it is really an amazing microscopic organism called a radi...
06/02/2020

It looks like something out of a science fiction movie... but it is really an amazing microscopic organism called a radiolarian.

Color enhanced scanning electron microscope (SEM) image of the internal siliceous (silica) skeleton of Radiolaria sp. Radiolaria are amoeboid protozoa with a diameter 0.1 to 0.2 mm that produce intricate mineral skeletons, typically with a central capsule dividing the cell into the inner and outer sections. Around the skeleton is an external layer of protoplasm from which radiate numerous pseudopodia ("false feet"). Radiolaria are found as zooplankton throughout the oceans and their skeletal remains make up a large part of the cover of the ocean floor as siliceous ooze. They can often contain symbiotic algae, especially zooxanthellae (photosynthetic dinoflagellates), which provide most of the cell's energy. Due to their rapid evolutionary changes, they are an important diagnostic fossil found from the Cambrian Period onwards.
This specimen was collected in the Mediterranean ocean off the cost of Sicily Italy. Field of view is 95 um.

© Ted Kinsman / Science Source

ScienceSource.com image ID# SS21953174

#radiolaria #radiolarian #silica #siliceous #protozoan #marinebiology #ameboid #amoeba #shell #silicashell #red #cell #singlecell #singlecelled #biology #biologyclass #biologyteacher #sem #spikes #scanningelectronmicroscopy #microscopy #sciart #scienceart #alwayslearning #scienceteacher #science #homeschoolscience #stockphoto #stockphotography @tedkinsman

Common Shore Crab, SEMColor enhanced scanning electron micrograph (SEM) of a juvenile common shore crab, Carcinus maenas...
06/01/2020

Common Shore Crab, SEM

Color enhanced scanning electron micrograph (SEM) of a juvenile common shore crab, Carcinus maenas. The common shore crab is a relative of the swimming crabs (family Portunidae), but it lacks flattened paddles on its hind limbs, and consequently it is only a moderate swimmer. Its forelimbs are powerful pincers. The common shore crab feeds on worms, molluscs, algae and carrion. Its range extends from Norway through the Mediterranean to the northern Atlantic coasts of Africa.

© SPL/Science Source

ScienceSource.com image ID# SS297294

#crab #commoncrab #commonshorecrab #carcinusmaenas #carcinus #shorecrab #greenshorecrab #crustacean #crustaceans ##crustaceansofinstagram # #littoral #marinebiology #biology #biologyteacher #nature #wildlife #ocean #sem #scanningelectronmicroscopy #microscopy #sciart #scienceart #alwayslearning #scienceteacher #science #homeschoolscience #stockphoto #stockphotography

Swimming Patterns of the Common Tadpole, Polarized LightA Bullfrog (Rana catesbeiana) tadpole, or pollywog. These tadpol...
06/01/2020

Swimming Patterns of the Common Tadpole, Polarized Light

A Bullfrog (Rana catesbeiana) tadpole, or pollywog. These tadpoles take two seasons to mature and are common throughout North America. A special flow visualization fluid was added to the water to show the motion of the animal in polarized light.

© Ted Kinsman/Science Source

ScienceSource.com image ID# SS22570611

#amphibianweek #amphibians #amphibian #AmphibianAlly #AmphibianArt #sciart #scienceart #alwayslearning #biology #scienceteacher #homeschoolscience #biologyteacher #nature #wildlife#frog #frogs #tadpole #tadpoles #fluiddynamics #viscosity #polarizedlight #rana #ranacatesbeiana #polarization #physics #science #swimming #stockphoto #stockphotography

It's Amphibian Week!June 1-7, 2020, is the first annual, International Amphibian Week.You may wonder, why do amphibians ...
06/01/2020

It's Amphibian Week!

June 1-7, 2020, is the first annual, International Amphibian Week.

You may wonder, why do amphibians need this special recognition? For starters, amphibians are unique. They begin their lives in the water, but most of their adult life is on land. And they are ectothermic, meaning their body temperature relies on external sources, like a rock heated by the sun or a river or lake. Amphibians are sensitive to invasive species, drought, disease, and other changes where they live. So researchers study amphibians because they often show early signs of stressors, like disease and climate change.

There’s another reason to recognize amphibians this week: many are in danger. About one third of all amphibian species are in danger of extinction. Many animals rely on amphibians for food, so when they die off, it affects the entire natural area. Some of the threats amphibians face include disease (like the ranavirus or chytrid fungus), changes in snowpack/rainfall, loss of wetlands, and splitting up their habitats. We need amphibians, and now they need us.

To kick off this inaugural event, Partners in Amphibian and Reptile Conservation (PARC) is partnering with the Amphibian Survival Alliance, Amphibian and Reptile Conservancy, the U.S. Geological Survey, National Park Service, U.S. Fish and Wildlife Facility, U.S. Forest Service, Bureau of Land Management, U.S. Department of Defense PARC, Army Corps of Engineers, the Smithsonian Zoo, and other partners to initiate and promote the awesomeness of amphibians and their conservation throughout the week. We invite you to join the celebration!

Join the movement on Facebook, Twitter, and Instagram June 1-7, 2020. All week we’ll be sharing information about amphibians, how important they are, the threats they face, and how you can help them. Always use #AmphibianWeek, and some other fun hashtags to use include #LeaveTheLeaves, #AmphibianAlly and #AmphibianArt
( above text from @nationalparkservice )

Image: © Mark Taylor/Science Source
African Bullfrog (Pyxicephalus adspersus), mouth wide open.

ScienceSource.com image ID# SS22637292

#amphibianweek #amphibian #amphibians #africanbullfrog #bullfrog #pyxicephalus #pyxicephalusadspersus #frog #frogsofinstagram #amphibiansofinstagram #nature #wildlife #

Acorn Barnacles and Barnacle GlueImage 1: Color enhanced scanning electron micrograph (SEM) of three acorn barnacles (El...
05/31/2020

Acorn Barnacles and Barnacle Glue

Image 1: Color enhanced scanning electron micrograph (SEM) of three acorn barnacles (Elminius modestus) attached to a rock. These sedentary marine crustaceans attach themselves to a hard surface and filter plankton from the water using their feathery legs (not seen). These can be withdrawn into the hard shell when the barnacles are threatened or left out of water at low tide. They attach themselves to rocks using a strong glue (seen in second image). This adhesive has attracted much research, as it is hoped similar synthetic glues could be created for use in medicine and other environments that call for a glue that can be used underwater. Magnification: x9 at 6x7cm size.
© Andrew Syred/Science Source
ScienceSource.com image ID# SS2163333

Image 2: Color enhanced scanning electron micrograph (SEM) of a section through the byssus (glue threads) of an acorn barnacle (Elminius modestus). Magnification: x32 at 6x7cm size.
© Andrew Syred/Science Source
ScienceSource.com image ID# SS2165757

#barnacle #barnacles #barnacleglue #glue #glues #crustacean #crustaceans #invertebrate #invertebrates #invertebratesofinstagram #crustaceansofinstagram #sem #scanningelectronmicroscopy #microscopy #sciart #scienceart #alwayslearning #scienceteacher #science #homeschoolscience #stockphoto #stockphotography #biology #marinebiology #marinebiologist #futurescientist #biologyglass #materialscience #materialscience #materialsengineering #materialengineering #chemicalengineering #chemsitry #chemsitryteacher

Root Section, SEMColor enhanced scanning electron micrograph (SEM) of a section through a rootlet of a dicotyledon plant...
05/31/2020

Root Section, SEM

Color enhanced scanning electron micrograph (SEM) of a section through a rootlet of a dicotyledon plant. The vascular bundle consists of xylem (four yellow circles, center) and phloem (beige) tissue. Xylem transports water and mineral nutrients from the roots throughout the plant and phloem transports carbohydrates and plant hormones around the plant. Surrounding the vascular bundle is single layer of endodermis (orange), then cortex (brown), which consists of parenchyma cells. The outermost layer (cream) is the epidermis. Magnification: x400 when printed 10 centimeters wide.

© Steve Gschmeissner / Science Source

ScienceSource.com image ID# SS2318024

#root #roots #plant #plants #vascularbundle #xylem #phloem #endodermis #parenchyma #cortex #roothairs #roothair #sem #scanningelectronmicroscopy #microscopy #sciart #scienceart #alwayslearning #scienceteacher #science #homeschoolscience #stockphoto #stockphotography #botany #botanist #futurescientist #nature #biologyteacher #biology

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