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Question
Heart , is present in how many classes ? Brain is present in how many classes? Lungs are present in how many classes? In animal kingdom
Heart , is present in how many classes ? Brain is present in how many classes? Lungs are present in how many classes? In animal kingdom
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Solution
No.
Heart is present in many classes
Two chambered heart is present in organisms like fishes. Only one atria and one ventricle is present which are not separated and hence mixing of oxygenated and deoxygenated blood blood occurs. (b) Three chambered heart develops after the division of auricle into right and left halves as in amphibian. Mixing of oxygenated and deoxygenated blood occurs in ventricles. (c) An intermediary heart is present in reptiles in which ventricle get partially divided through a septum which is incomplete, e.g., Crocodiles, thus having four-chambered heart. (d) In four chambered heart both the auricle and ventricle are divided into two halves and thus no mixing of oxygenated and deoxygenated blood occurs, e.g., birds
Lungs and brain only present in chordatas
Heart is present in many classes
Two chambered heart is present in organisms like fishes. Only one atria and one ventricle is present which are not separated and hence mixing of oxygenated and deoxygenated blood blood occurs. (b) Three chambered heart develops after the division of auricle into right and left halves as in amphibian. Mixing of oxygenated and deoxygenated blood occurs in ventricles. (c) An intermediary heart is present in reptiles in which ventricle get partially divided through a septum which is incomplete, e.g., Crocodiles, thus having four-chambered heart. (d) In four chambered heart both the auricle and ventricle are divided into two halves and thus no mixing of oxygenated and deoxygenated blood occurs, e.g., birds
Lungs and brain only present in chordatas
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