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Biology lessons (Reptiles (Shoug Almoshaigh) (circulation (have 2…
Biology lessons
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Fishes (Layan Alzamil)
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Circulation
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-from the heart the blood goes to the gills then through the body delivering oxygenated blood to tissue.
-2 chambers (1 Atrium, 1 ventricle)
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Reproduction
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-They release their gametes near each other to reproduce, this process is spawning.
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Birds (Maha Alhamlan)
Endotherms, feathers, and lightweight bones, they dont have bladder, they breath through lungs, 4-chambered heart
Feathers:
• contour feathers: Feathers that cover the body, wings, and tail of a bird used for flying
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Lightweight bones: Large, powerful flight muscles called keel attach to the sternum.
Feeding and digestion
Many birds have a crop at the base of the esophagus that stores food.
The gizzard contains small stones that crush food the birds have swallowed.
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