Question:
A four chambered heart is not found in________
A four chambered heart is not found in________
Updated On: Apr 19, 2024
- Snake
- Crocodile
- Mammals
- Birds
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The Correct Option is A
Solution and Explanation
- Mammals, birds, and crocodiles all have four-chambered hearts. A four-chambered heart is an efficient way to separate oxygen-rich blood from oxygen-poor blood. This separation allows these animals to maintain a high body temperature and a high level of activity.
- Snakes, on the other hand, have three-chambered hearts. A three-chambered heart is less efficient than a four-chambered heart, but it is sufficient for the needs of a snake. Snakes are cold-blooded animals and do not have the same energy demands as mammals and birds.
Thus, the right answer to this question is a snake.
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Concepts Used:
Circulatory Pathways
Virtually every cell, tissue, organ, and system in the body is impacted by the circulatory system.
- Digestive - Absorbs nutrients and water; delivers nutrients (except most lipids) to liver for processing by hepactic portal vein; provides nutrients essential for hematopoiesis and building hemoglobin.
- Endocrine - Delivers hormones: atrial natriuretic hormone (peptide) secreted by the heart atrial cells to help regulate blood volumes and pressures; epinephrine, ANH, angiotensin II, ADH, and thyroxine to help regulate blood pressure; estrogen to promote vascular health in women and men.
- Integumentary - Carries clotting factors, platelets, and white blood cells for homeostatis, fighting infection, and reparing damage; regulates temperature by controlling blood flow to the surface, where heat can be dissipated; provides some coloration of integument; acts as a blood reservoir.
- Muscular - Provides nutrients and oxygen for contraction; removes lactic acid and distributes heat generated by contraction; muscular pumps aid in venous return; exercise contributes to cardiovascular health and helps to prevent atherosclerosis.