Blood Composition And Function Pdf


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17.04.2021 at 20:32
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blood composition and function pdf

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Find GPs in Australia. The formed elements are so named because they are enclosed in a plasma membrane and have a definite structure and shape. All formed elements are cells except for the platelets, which are tiny fragments of bone marrow cells. Leukocytes are further classified into two subcategories called granulocytes which consist of neutrophils, eosinophils and basophils; and agranulocytes which consist of lymphocytes and monocytes. The formed elements can be separated from plasma by centrifuge, where a blood sample is spun for a few minutes in a tube to separate its components according to their densities.

Blood function and composition

When a sample of blood is spun in a centrifuge , the cells and cell fragments are separated from the liquid intercellular matrix. Because the formed elements are heavier than the liquid matrix, they are packed in the bottom of the tube by the centrifugal force. The light yellow colored liquid on the top is the plasma , which accounts for about 55 percent of the blood volume and red blood cells is called the hematocrit ,or packed cell volume PCV. The white blood cells and platelets form a thin white layer, called the " buffy coat ", between plasma and red blood cells. The watery fluid portion of blood 90 percent water in which the corpuscular elements are suspended.

Blood , fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide and other waste products. Technically, blood is a transport liquid pumped by the heart or an equivalent structure to all parts of the body, after which it is returned to the heart to repeat the process. Blood is both a tissue and a fluid. It is a tissue because it is a collection of similar specialized cells that serve particular functions. These cells are suspended in a liquid matrix plasma , which makes the blood a fluid. If blood flow ceases, death will occur within minutes because of the effects of an unfavourable environment on highly susceptible cells.

1. Composition of Blood and its Functions

Identify the primary functions of blood, its fluid and cellular components, and its characteristics. Recall that blood is a connective tissue. Like all connective tissues, it is made up of cellular elements and an extracellular matrix. The cellular elements—referred to as the formed elements —include red blood cells RBCs , white blood cells WBCs , and cell fragments called platelets. The extracellular matrix, called plasma , makes blood unique among connective tissues because it is fluid. This fluid, which is mostly water, suspends the formed elements and enables them to circulate throughout the body within the cardiovascular system.

Components of blood

Blood is made of of several components, including red blood cells, white blood cells, platelets, and the plasma, which contains coagulation factors and serum. Blood helps maintain homeostasis by stabilizing pH, temperature, osmotic pressure, and by eliminating excess heat. Blood supports growth by distributing nutrients and hormones, and by removing waste. These cells deliver oxygen to the cells and remove carbon dioxide. Blood plays a protective role by transporting clotting factors and platelets to prevent blood loss after injury.

Composition of the Blood

Blood is a connective tissue that helps in the transportation of substances, protects against diseases and regulates the temperature of the body. Do you know why the colour of blood is red?

18.1 Functions of Blood

Blood is a specialized body fluid. It has four main components: plasma, red blood cells, white blood cells, and platelets. Blood has many different functions, including:. The blood that runs through the veins, arteries, and capillaries is known as whole blood, a mixture of about 55 percent plasma and 45 percent blood cells. About 7 to 8 percent of your total body weight is blood. An average-sized man has about 12 pints of blood in his body, and an average-sized woman has about nine pints.

Blood is a combination of plasma and cells that circulate through the entire body. It is a specialized bodily fluid that supplies essential substances around the body, such as sugars, oxygen, and hormones. Hematologists work to identify and prevent blood and bone marrow diseases, as well as studying and treating the immune system, blood clotting, and the veins and arteries. In the United States U.

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- Blood is a viscous fluid formed of cellular element suspended in plasma. cells), and Platelets. - Plasma is a viscous, translucent, yellowish fluid composed of water (90%), proteins (7%), organic salts (1%), and organic compound (2%) such as amino acids, lipids, and vitamins.


Blood: Composition, Functions, Transfusion and Blood Group

3 Comments

Eloise B.
19.04.2021 at 06:55 - Reply

Blood. I. Composition/function. A. Introduction. - 8% body volume; specialized connective tissue where cells are formed elements and plasma is extracellular.

Owen C.
20.04.2021 at 22:46 - Reply

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Byrphenorith
25.04.2021 at 23:36 - Reply

Blood is a suspension of blood elements erythrocytes, leukocytes, and platelets in blood plasma.

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