The main function of plasma is to carry blood cells, transport substances needed to maintain human life activities and wastes generated in the body. Plasma is equivalent to the gap of connective tissue. Plasma is an important part of blood, and it is a light yellow liquid (because it contains bilirubin). In the chemical composition of plasma, water accounts for 90~92%, and another 65,438+00% is mainly solute plasma protein. It also contains electrolytes, nutrients, enzymes, hormones, cholesterol and other important components. Plasma protein is the general name of various protein, which can be divided into albumin, globulin and fibrinogen by salting out.
Description of red blood cell: It is a double concave disk with thin center and thick periphery, so in blood smear samples, the center is lightly stained and the periphery is deeply stained. Fresh single red blood cells are yellow-green, and a large number of red blood cells make blood scarlet.
Red blood cells contain hemoglobin, which makes blood red. Hemoglobin contains iron, and people with anemia should eat more iron-rich foods to replenish blood. Hemoglobin can combine with oxygen in the air, so red blood cells can transport oxygen inhaled into alveoli to tissues through hemoglobin, and carbon dioxide generated by metabolism in tissues is also transported to lungs through red blood cells and exchanged with oxygen in vitro through alveoli. Expel carbon dioxide from the body. Hemoglobin is more easily combined with carbon monoxide, and once it is combined with carbon monoxide, it cannot be separated. When carbon monoxide and its content increase in the air, it can cause carbon monoxide poisoning.