Make a Report on ‘COMPARATIVE STUDY OF DIGESTIVE SYSTEM AND CIRCULATORY
SYSTEM OF DIFFERENT ANIMALS; SUCH AS HUMANS, FISH, COW AND CROCODILE’ [Report should be made on A4- Sheets].
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Answer:
The circulatory system is effectively a network of cylindrical vessels: the arteries, veins, and capillaries that emanate from a pump, the heart. In all vertebrate organisms, as well as some invertebrates, this is a closed-loop system, in which the blood is not free in a cavity. In a closed circulatory system, blood is contained inside blood vessels and circulates unidirectionally from the heart around the systemic circulatory route, then returns to the heart again.
As opposed to a closed system, arthropods– including insects, crustaceans, and most mollusks– have an ‘open’ circulatory system. In an open circulatory system, the blood is not enclosed in blood vessels but is pumped into an open cavity called a hemocoel and is called hemolymph because the blood mixes with the interstitial fluid. As the heart beats and the animal moves, the hemolymph circulates around the organs within the body cavity and then reenters the hearts through openings called ostia. This movement allows for nutrient exchange, and in some organisms lacking direct gas exchange sites, a basic mechanism to transport gasses beyond the exchange site. Because the gas exchange in many open-circulatory systems tends to be relatively low for metabolically-active organs and tissues, a tradeoff exists between this system and the much more energy-consuming, harder-to-maintain closed system.
Explanation:
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Explanation:
Make a Report on ‘COMPARATIVE STUDY OF DIGESTIVE SYSTEM AND CIRCULATORY SYSTEM OF
DIFFERENT ANIMALS; SUCH AS HUMANS, FISH, COW AND CROCODILE’