Cardiovascular System Parts And Functions Pdf


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23.04.2021 at 03:00
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cardiovascular system parts and functions pdf

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Oxygen enters the bloodstream through tiny membranes in the lungs that absorb oxygen as it is inhaled. As the body uses the oxygen and processes nutrients, it creates carbon dioxide, which your lungs expel as you exhale.

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.

Human cardiovascular system

Skip to content. Skip to navigation. The four major functions of the cardiovascular system are:. The cardiovascular system acts as an internal road network, linking all parts of the body via a system of highways arteries and veins , main roads arterioles and venules and streets, avenues and lanes capillaries. This network allows a non-stop courier system the blood to deliver and expel nutrients, gases, waste products and messages throughout the body.

The circulatory system , also called the cardiovascular system or the vascular system , is an organ system that permits blood to circulate and transport nutrients such as amino acids and electrolytes , oxygen , carbon dioxide , hormones , and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases , stabilize temperature and pH , and maintain homeostasis. The circulatory system includes the lymphatic system , which circulates lymph. Lymph is essentially recycled excess blood plasma after it has been filtered from the interstitial fluid between cells and returned to the lymphatic system. The cardiovascular from Latin words meaning "heart" and "vessel" system comprises the blood, heart, and blood vessels. The circulatory system of the blood is seen as having two components, a systemic circulation and a pulmonary circulation.

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.

Circulatory system

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. The heart is a hollow muscular organ which beats over , times a day to pump blood around the body's 60, miles of blood vessels. The right side of the heart receives blood and sends it to the lungs to be oxygenated, while the left side receives oxygenated blood from the lungs and sends it out to the tissues of the body. In a normal heart beat the atria contract while the ventricles relax, then the ventricles contract while the atria relax. There are VALVES through which blood passes between ventricle and atrium, these close in such a way that blood does not backwash during the pauses between ventricular contractions.

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Blood must always circulate to sustain life. It carries oxygen from the air we breathe to cells throughout the body. The pumping of the heart drives this blood flow through the arteries, capillaries, and veins. One set of blood vessels circulates blood through the lungs for gas exchange. The other vessels fuel the rest of the body. Read on to learn more about these crucial circulatory system functions. Pulmonary circulation moves blood between the heart and the lungs.

Cardiovascular system (heart) anatomy

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General Features of the Cardiovascular System

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 Замечательно.  - Он даже застонал.  - Я позвоню Стратмору и попрошу прислать нам письменное подтверждение. - Нет, - сказала Мидж, - игнорируя сарказм, прозвучавший в его словах.  - Стратмор уже солгал нам.  - Она окинула Бринкерхоффа оценивающим взглядом.  - У тебя есть ключ от кабинета Фонтейна.

Все было очень просто: подойдя к жертве вплотную, нужно низко держать револьвер, чтобы никто не заметил, сделать два выстрела в спину, Беккер начнет падать, Халохот подхватит его и оттащит к скамье, как друга, которому вдруг стало плохо. Затем он быстро побежит в заднюю часть собора, словно бы за помощью, и в возникшей неразберихе исчезнет прежде, чем люди поймут, что произошло. Пять человек. Четверо. Всего трое.

Major Functions of the Cardiovascular System

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The heart is usually situated in the middle of the thorax with the largest part of the dominant site of resistance to flow in the vascular system, play major roles in.

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