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Amphibian Body Systems, Group 1- Ellan - Rafaa - ghalia -zaina - Nouf -…
Amphibian Body Systems
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Respiratory(Zaina)
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as adults most amphibians breathe through their skin, lungs and mouth
Circulatory System
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First loop: oxygen poor blood moves from the heart to pick up oxygen from the lungs and skin, then returns to the heart
Second loop: Oxygen filled blood moves from the heart though vessels to the body where oxygen diffuses in cells
The adult heart has 3 chambers: right atrium, left atrium, ventricle
Right atrium receives oxygen poor blood, left atrium receives oxygen rich blood , the ventricle is undivided
Brain & Senses (ellan)
the cerebellum is important for maintaining balance in fishes and is not well developed in terrestrial amphibians close to the ground
frog eyes have nictitating membrane which are transparent eyelids that protect the underwater and prevent it from drying out on land
the tympanic membrane is an eardrum. In frogs, it is a thin external membrane on the side of the head used to hear high pitched sounds and to amplify sound from the. vocal chords
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Reproduction(Zaina)
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the eggs have no shells, so they use a jelly like substance to help them stick to plants in water
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Feeding & Digestion
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As adults, both frogs and salamanders are predators. They feed on a variety of invertebrates and small vertebrates.
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Food moves from the mouth through the esophagus to the stomach, where digestion begins. The food moves to the small intestine, which receives enzymes from the pancreas to digest food. From the intestine, food is also absorbed into the bloodstream. From the small intestine, food moves to the large intestine before waste is eliminated.
At the end of the intestine is a chamber called the cloaca. The cloaca receives digestive and urinary wastes as well as eggs or sperm before they leave the body.
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