Question:
Systemic heart refers to
Systemic heart refers to
Updated On: Jun 7, 2022
- the two ventricles together in humans
- the heart that contracts under stimulation from nervous system
- left auricle and left ventricle in higher vertebrates
- entire heart in lower vertebrates
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The Correct Option is C
Solution and Explanation
Higher vertebrates exhibit double circulation of blood namely systemic and pulmonary circulation. Systemic circulation involves the distribution of oxygenated blood via the aorta from the heart to all parts of the body, and the collection of deoxygenated blood from all parts of the body through the great veins into the heart. Pulmonary circulation denotes the route impure blood takes from the heart to the lungs for purification and then back to the heart, the left auricle receives oxygenated blood and passes it to the left ventricle. The left ventricle pumps the pure blood to all parts of the body through aorta. Hence these two chambers involved in systemic circulation are referred to as systemic heart.
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Concepts Used:
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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.