Question:
The opening of auricles and ventricle on the right side is guarded by
The opening of auricles and ventricle on the right side is guarded by
Updated On: Jun 18, 2022
- tricuspid valve
- bicuspid valve
- semilunar valve
- eustachian tube
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The Correct Option is A
Solution and Explanation
Tricuspid valve consists of three flaps, situated between the right atrium and the right ventricle of the mammalian heart. Bicuspid valve consists of two flaps, situated between the left atrium and the left ventricle of the birds and mammalian heart. Semilunar valve in the heart are found in the pulmonary artery and in aorta, that prevents the backflow of blood into the right and left ventricles from the pulmonary artery and the aorta, respectively, thus maintaining blood flow in a single direction. Eustachian tube connects the middle ear to the back of throat (pharynx) in vertebrates.
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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.