Cash cardio and pulmonart pdf3/10/2024 The capacity of the venous system is large, and at least 70 percent of the blood volume in humans is found in the veins. The cardiovascular system itself includes a four-chambered muscular pump (two atria and two ventricles) with both internal and external regulatory mechanisms, a vascular tree with arteries that transport oxygenated blood under relatively high pressures to the body at approximately 80 to 90 mm Hg pressure, and veins that return deoxygenated blood to the heart at lower pressures of 5 to 15 mm Hg. Complex monitoring and control functions are required to meet normal physiological challenges. Because of variability in demand associated with exercise and changes in the gravity vector associated with various body positions in humans and other bipeds, the cardiovascular system has evolved with a range of responsiveness not found in other systems. The cardiovascular system, which includes the heart and all the body's blood vessels, is responsible for delivering oxygen to all tissues of the body and also provides the transport system for metabolic waste products cleared by other systems, including the kidneys, lungs, and some components of the gastrointestinal tract.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |