What is hemoglobin?
To give blood to the general analysis was necessary to everyone. When receiving the results of the research, the doctor sometimes informs the patient about the insufficient amount of hemoglobin or about its excess in the blood. And usually he never explains to the patient what hemoglobin is and why it is necessary to determine it at all.
Determination of hemoglobin
Hemoglobin is a red pigment contained inerythrocytes of human blood. It is he who gives the red color of blood, which is due to the presence in the molecule of hemoglobin of a small, iron-containing non-protein part - heme. The protein component of its molecule is called the globin.
Work of hemoglobin
For the normal functioning of internalorgans and tissues need oxygen, delivered with blood. It is necessary to keep oxygen in the blood, which makes hemoglobin. One gram of hemoglobin captures oxygen in a volume of 1.34 ml. With a lack of hemoglobin in the body (anemia), oxygen deficiency occurs in organs with the most intensive metabolism: the heart, the brain, the kidneys and the liver.
The amount of hemoglobin in a liter of blood in healthypeople - 120-160 g. The norm of its content in the blood of men is 130-160 g / l, and the index of 120-140 g / l is considered the norm for women. Reduction of hemoglobin in the blood to 60 g / l is already dangerous for the patient's life.
Where does it come from
At rest, the heart pumps for 1 minuteabout 4 liters of blood, carrying body tissues about 200 ml of oxygen. Active muscular work requires a tenfold increase in the amount of oxygen supplied, for which hemoglobin is constantly produced by red blood cells. The formation of one molecule of hemoglobin occurs in 90 seconds.