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Frog Disection - College Term Papers

Frog Disection

Frogs have a mouth, which serves as an insect trap. The mouth, consist of a tongue and two sets of special teeth. The frog has a large elastic gullet that allows it to swallow large prey. Food passes from the gullet through the tubular esophagus and then into the stomach. Then chemical digestion occurs in the stomach and the small intestine with the help of the digestive enzymes that are released by the liver and pancreas.
(Giffard, R. & Nat, M 1986.)
After digestion is completed nutrients are absorbed into the blood through the walls of the small intestines. The waste left over is moved into the large intestine where water is reabsorbed. Then the waste is eliminated through the cloaca ...

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herbivore’s because they have to break down cellulose, which takes a longer time. (Giffard R. & Nat, M 1986)
This concludes my study on the digestion system of the frog.
FROG'S CIRCULATORY SYSTEM

A frog has a closed circulatory system just like humans. This means blood is always enclosed in blood vessels as it circulates the organisms body. Blood also circulates more rapidly and efficiently through a closed circulatory system. It consists of a very well developed system of arteries, veins and capillaries that reach all the living cells of an organism. (Cooper, H., Hays, S., Walker D., Linden R. 1982)
The frog’s heart consists of three chambers. The left atrium receives "oxygenated" oxygen rich blood from the lungs, while the right atrium receives "deoxygenated" oxygen poor blood, which returns from the body tissues. As the two atria pump, together blood from each atrium, it forces into a muscular ventricle. When the ventricle contracts, it forces blood through a ...

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PAPER DETAILS

Added: 12/24/2006 02:45:26 PM
Category: Science & Nature
Type: Premium Paper
Words: 838
Pages: 4

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