Structure And Function Of Cardiovascular System Pdf
- and pdf
- Thursday, April 15, 2021 11:08:48 AM
- 0 comment
File Name: structure and function of cardiovascular system .zip
The heart pumps blood through a vast network of arteries and veins. Blood is a living fluid.
Blood circulates through a network of vessels throughout the body to provide individual cells with oxygen and nutrients and helps dispose of metabolic wastes. The heart pumps the blood around the blood vessels. The plasma is largely water, containing proteins, nutrients, hormones, antibodies, and dissolved waste products.
Human cardiovascular system
Growing interest in behavioral medicine has focused attention on the function and control of the cardiovascular system, partly because of its involuntary responsiveness to emotional and stressful situations. The external manifestations of cardiovascular responses provide objective indications of the changing psychological status of normal subjects and patients. An expanding array of noninvasive techniques open opportunities for new and exciting research regarding the potential roles of psychological and behavioral factors in the development of dysfunction and disease. Current concepts of cardiovascular psychophysiology have been presented in a comprehensive overview edited by Obrist Unable to display preview. Download preview PDF.
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.
The human heart is a finely-tuned instrument that serves the whole body. It is a muscular organ around the size of a closed fist, and it sits in the chest, slightly to the left of center. This delivers oxygen- and nutrient-rich blood to tissues and organs and carries away waste. The heart sends deoxygenated blood to the lungs, where the blood loads up with oxygen and unloads carbon dioxide, a waste product of metabolism. Together, the heart, blood, and blood vessels — arteries, capillaries, and veins — make up the circulatory system. In this article, we explore the structure of the heart, how it pumps blood around the body, and the electrical system that controls it.
The cardiovascular system can be thought of as the transport system of the body. This system has three main components: the heart , the blood vessel and the blood itself. Blood can be thought of as a fluid which contains the oxygen and nutrients the body needs and carries the wastes which need to be removed. The following information describes the structure and function of the heart and the cardiovascular system as a whole. The heart is located in between the two lungs. It lies left of the middle of the chest.
The cardiovascular system has three main functions:. In the heat, blood vessels close to the surface of the skin enlarge. This process is called vasodilation. This allows more heat to be lost from the blood. When a person takes part in exercise their face can become pink due to vasodilation of the blood vessels close to the skin's surface. In the cold, blood vessels at the skin's surface close.
(B) The human circulatory system has corresponding features and similar functions. From Rushmer (); reprinted by permission of Saunders. the aorta and the.
Structure and Function of the Cardiovascular System
The blood vessels are the components of the circulatory system that transport blood throughout the human body. They also take waste and carbon dioxide away from the tissues. Blood vessels are needed to sustain life, because all of the body's tissues rely on their functionality. There are five types of blood vessels: the arteries , which carry the blood away from the heart ; the arterioles ; the capillaries , where the exchange of water and chemicals between the blood and the tissues occurs; the venules ; and the veins , which carry blood from the capillaries back towards the heart.
- Не делай. Скорее всего Хейл держит там копию ключа. Она мне нужна.
Успокойся, Сьюзан, - сказал Стратмор, положив руку ей на плечо. Это умиротворяющее прикосновение вывело Сьюзан из оцепенения. Внезапно она вспомнила, зачем искала Стратмора, и повернулась к .
А что. - Он говорит, что вручит победителю ключ. - Ключ. - В этом и заключается его замысел.
Сьюзан вдруг поняла, что смеется и плачет одновременно. Коммандер спас ей жизнь. Стоя в темноте, она испытывала чувство огромного облегчения, смешанного, конечно же, с ощущением вины: агенты безопасности приближаются.
Я еле добрел. - Он не предложил вам больницы поприличнее. - На этой его чертовой тарантайке.
Первичное! - воскликнула. И повернулась к Джаббе. - Ключ - это первичное, то есть простое число.
Она услышала, что в кабине работает вентиляция. Лифт. Почему же не открывается дверца.