Red blood cell function, what is the function of red blood cells?

Oxygen, not oxygen. It is hemoglobin that reacts with oxygen and then releases oxygen in the organs.

Transport oxygen. Oxygen is an element, and oxygen is a substance. ）

Red blood cells can transport oxygen and carbon dioxide.

1. Transportation function.

Heme is very active, it binds to both oxygen and carbon dioxide. Therefore, its main job is to transport oxygen and carbon dioxide. The function of red blood cells is to transport oxygen, carbon dioxide, electrolytes, glucose, and amino acids, which are essential for the body's metabolism.

In addition, it also plays a certain buffering role in the acid-base balance. Both of these functions are achieved through hemoglobin in red blood cells. If red blood cells rupture, hemoglobin is released and dissolves in plasma, losing these functions.

2. Enhance phagocytosis.

When antibodies and complement are bound to the surface of cancer cells, the C3B receptor on the surface of red blood cells can make cancer cells adhere to red blood cells, so they are easily captured and engulfed by phagocytic cells, thereby preventing the metastasis and spread of cancer cells.

In addition, erythrocytes also have phagocytic cell-like functions, and have peroxidase on the surface of their cell membranes, which is a typical lysosomal enzyme that can play a macrophage-like killing role.

3. Immune adhesion.

Immunoadhesion refers to the adhesion of antigen-antibody complexes to complement C3B to primate or non-primate red blood cells and platelets, a phenomenon known collectively as "hematocyte immune adhesion".

Red blood cells are immunoadhesive because they have C3B receptors on their surface. The receptor is a glycoprotein with a molecular weight of 205,000.

C3B receptors on red blood cells account for more than 95% of the total number of C3B receptors in the blood circulation. Thus, the antigen-antibody complex in the blood circulation is 500 1000 times more likely to encounter red blood cells than white blood cells. Therefore, the ability of red blood cells to clear immune complexes is beyond the reach of white blood cells and lymphocytes.

The erythrocyte membrane is selectively permeable, and the erythrocyte is plastic, suspension, and osmotic fragility. These characteristics are related to the biconcave disc-shape of red microdermal transporters.

1.Permeability of red blood cell membranes.

Since the red blood cell membrane is a semi-permeable membrane with lipid bipartite and suffocator layers as the backbone, fat-soluble substances (such as gas molecules such as O2 and CO2) can pass freely, and urea can also freely permeate people. In the electrolyte, negative ions (such as CI-, HC) are easy to pass through the cell membrane, but positive ions are difficult to pass through.

2.Plasticity deformability.

As red blood cells move through blood vessels, they need to pass through capillaries and sinus pores that are smaller than it. At this time, the red blood cells are curled and deformed, and then return to their original shape after passing, this deformation is called plastic deformation. In patients with hereditary spherocytosis, the ability of red blood cells to deform is reduced;

3.Osmotic brittleness.

The property of red blood cells to resist ruptured hemolysis in a hypotonic solution is called erythrocyte osmotic fragility. The osmotic fragility is large, indicating that the red blood cells have little resistance to the hypotonic solution, and conversely, the osmotic fragility is small, and the resistance is large. In senescent erythrocytes and hereditary spherocytosis, the fragility is increased;

4.Suspension stability.

In the physiological state, red blood cells can be suspended in the plasma fairly stably and do not sink easily, and this property of red blood cells is called suspension stability. The rate of erythrocyte sedimentation is usually expressed in terms of the distance from which erythrocyte sedimentation is not settled in the first hour, and is called erythrocyte sedimentation rate, or erythrocyte sedimentation rate for short. Normal values detected by the Wechsler method are 0 l5 mm h for males and 0 20 mm h for females

In some diseases (eg, active tuberculosis, rheumatic fever, etc.), the erythrocyte sedimentation rate is accelerated.

Erythrocytes mainly play a transport function because they contain hemoglobin.

DAO, hemoglobin binds exclusively to oxygen in the air, and red blood cells can transport oxygen inhaled into the alveoli through hemoglobin to various tissues in the body.

Red blood cells, also known as red blood cells, are often abbreviated as RBC in English in routine laboratory tests, and are the most abundant blood cells in the blood, and they are also the main medium for transporting oxygen through the blood in vertebrates, and also have immune functions. Mammalian mature red blood cells are nucleated, which means they have lost their DNA.

Red blood cells also do not have mitochondria, they release energy by breaking down glucose. Oxygen is transported, and a portion of carbon dioxide is transported. Carbon dioxide is dark purple when transporting and bright red when transporting oxygen.

Red blood cells are produced in the bone marrow and begin to grow in white blood cells. After the aging of red blood cells, it is easy to cause blood vessel blockage, so they will automatically return to the deep bone marrow, and white blood cells are responsible for destruction; Or when it passes through the liver, it is broken down into bile by withered cells.

The importance of red blood cells can be imagined, and doctors enter the human body to explore the important role of red blood cells.

Hello: The function of red blood cells is mainly completed by hemoglobin, which has two functions, one is to transport oxygen and carbon dioxide, and the other is to buffer the acid and alkaline substances produced by the body, because there are also some buffer pairs in red blood cells, but these two functions can only play their role if hemoglobin is present in red blood cells, if red blood cells rupture or dissolve, hemoglobin escapes from red blood cells, and loses its function.

The exchange of carbon dioxide and oxygen is carried out.

Among the blood cells in the human body, red blood cells have the largest number. Red blood cells are concave cakes on both sides, and their function is to transport oxygen and a portion of carbon dioxide, and are often referred to as oxygen transporters.