Components Of Blood And Their Functions Pdf
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Human Physiology pp Cite as. Blood is an opaque red fluid consisting of the pale yellow plasma called serum when the fibrinogen is removed and the cells suspended in it - the red corpuscles erythrocytes , the white corpuscles leukocytes and the platelets thrombocytes. Blood has an important role in clinical diagnosis, because it is easy to collect and there are many diseases in which the blood composition and properties of the components are characteristically altered.
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. This constitutes less than one percent of total deaths from disease.
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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. The constancy of the composition of the blood is made possible by the circulation , which conveys blood through the organs that regulate the concentrations of its components.
Red blood cells, or erythrocytes, are one of the components of blood. The others are plasma, platelets and white blood cells. They are continuously produced in our bone marrow. Red blood cells carry oxygen from our lungs to the rest of our bodies. Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled. A low red blood cell count, known as anemia, can cause fatigue, shortness of breath, dizziness and other symptoms.
The heart pumps blood through the arteries, capillaries and veins to provide oxygen and nutrients to every cell of the body. The blood also carries away waste products. The adult human body contains approximately 5 liters of blood. It makes up 7 to 8 percent of a person's body weight. Approximately 2. Plasma is the liquid portion of the blood. Blood cells like red blood cells float in the plasma.
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. This volume is known as the haematocrit.
The liquid component of the blood in which the following blood cells are suspended:. Red blood cells erythrocytes. These carry oxygen from the lungs to the rest of the body. White blood cells leukocytes. These help fight infections and aid in the immune process.
See also Overview of Blood. Plasma is the liquid component of blood, in which the red blood cells, white blood cells, and platelets are suspended. It constitutes more than half of the blood's volume and consists mostly of water that contains dissolved salts electrolytes and proteins. The major protein in plasma is albumin. Albumin helps keep fluid from leaking out of blood vessels and into tissues, and albumin binds to and carries substances such as hormones and certain drugs. Other proteins in plasma include antibodies immunoglobulins , which actively defend the body against viruses, bacteria, fungi, and cancer cells, and clotting factors , which control bleeding. Plasma has other functions.
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.
Functions of the Blood
The albumin contained in plasma prevents the blood from losing too much water and consistency as it travels through the narrow, water-permeable blood vessels capillaries. Albumin transports various blood components and nutrients. The immunoglobulins also contained in plasma are antibodies that, along with white blood cells, play an important role in fighting against pathogens. Clotting factors, in combination with platelets, control hemorrhaging. A deficiency in these proteins can cause various health problems.
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:.
Components of blood
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