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In the more advanced animals, there are usually 10 organ systems: integumentary, skeletal, muscular, nervous, endocrine (hormonal), digestive, respiratory, circulatory, excretory, and reproductive. These systems appear gradually in the lower animals and attain their full complexity and functional specialization in the higher animals. In plants the primary organs are the stem, root, and leaf, all of which help to nourish the plant, and the reproductive organs (e.g., flowers, seed, and spores). As with animals, these organs are responsible for the basic life-sustaining functions of the organism.
pulmonary veins and arteries, circulation, cardiovascular system, human anatomy, (Netter replacement project - SSC)
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Human Organs: Fact or Fiction?
Is it true that we only use ten percent of our brain? Is the retina the lens at the front of the eye? Dissect these questions and learn more about human organs.
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