Search results for: 'Egg and Sperm Formations in Animals Animation'

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By: HWC, Views: 8330

• Under the influence of FSH and testosterone, Sertoli cells produce androgen-binding protein (ABP) that binds to testosterone and maintains high levels of the hormone near spermatogenic cells. • Testosterone stimulates the final stages of spermatogenesis. • In addition, testosterone is...

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Double Stranded DNA Molecule Animation

By: HWC, Views: 5557

Double Stranded DNA Molecule Animation

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Types of disease resistance: innate defenses & immunity

By: HWC, Views: 7961

Our immune system protects us and helps fight off disease. Microorganisms, small microscopic organisms, and viruses are everywhere. Ever thought about how many are on that door you just opened? Many microbes and viruses can cause disease and are termed pathogens. Plants and animals have what i...

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Electromagnetic Spectrum, Chlorophyll and Pigment & Light

By: HWC, Views: 7496

The sun gives off radiation that is called the electromagnetic spectrum. This is energy that travels as wavelengths and includes radio waves, X-rays and ultraviolet light. A portion of this radiation is known as visible light, and is the type of radiation that plants use to manufacture sugars. ...

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Natural Selection, Species Isolation and Real World Example

By: HWC, Views: 7151

`Natural selection' is the process in which organisms with adaptive traits survive and breed in greater number than organisms without such traits. Eventually, almost all of the individuals in the population will have the same adaptive trait. This was the concept presented by Charles Darwin in ...

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Introduction to Body Systems Animation

By: Administrator, Views: 751

Systems: A group of different organs functioning together for a common purpose.

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Leg Movement Animation

By: Administrator, Views: 392

This animation shows a list of muscles found in the leg used for movement

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Diversity of Living Creatures - Charles Darwin & the Beagle's Voyage

By: HWC, Views: 7460

As we look around at the living creatures on Earth, we see a great amount of diversity. In some cases, the differences are quite noticeable, like the differences between plants and animals. Some differences are not as easy to see, like the differences between two species of lizard. How did all...

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Wound Repair Animation

By: Administrator, Views: 10718

A wound is an injury to living tissue caused by a cut, blow, or other impact, typically one in which the skin is cut or broken.

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