The Cardiovascular System Of The Body - and thought
Human cardiovascular system , organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. It is a closed tubular system in which the blood is propelled by a muscular heart. Two circuits, the pulmonary and the systemic, consist of arterial , capillary , and venous components. The primary function of the heart is to serve as a muscular pump propelling blood into and through vessels to and from all parts of the body. The arteries, which receive this blood at high pressure and velocity and conduct it throughout the body, have thick walls that are composed of elastic fibrous tissue and muscle cells. The arterial tree—the branching system of arteries—terminates in short, narrow, muscular vessels called arterioles , from which blood enters simple endothelial tubes i. These thin, microscopic capillaries are permeable to vital cellular nutrients and waste products that they receive and distribute. From the capillaries, the blood, now depleted of oxygen and burdened with waste products, moving more slowly and under low pressure , enters small vessels called venules that converge to form veins, ultimately guiding the blood on its way back to the heart. The Cardiovascular System Of The Body.
The Cardiovascular System Of The Body Video
The Heart and Circulatory System - How They WorkDescription
The cardiovascular system includes the heart and blood vessels and performs the function of pumping and carrying blood to the rest of the body. The blood contains nutrients and oxygen to provide energy to allow the cells of the body to perform work.
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Cardiovascular System of the Dog The cardiovascular system includes the heart and blood vessels and performs the function of pumping and carrying blood to the rest of the body. Outside View of the Heart. Inside View of the Heart. One Cancer Patients' Story]
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