| |
Small Red Blood cell- The important aspect of a human bodyRed Blood Cells are the most common type of blood cells. Also known as the RBC's or enthrocytes principal means of delivering oxygen from the lungs to body tissues in a human body. A single drop blood contains millions of red blood cells which are constantly traveling through your body delivering oxygen and removing wastes. The absence of the red blood cells in our body would mean that you are virtually non-existent as you would surely die of suffocation.
Red blood cells are red because
they contain a protein called hemoglobin that is bright red in color. As the blood passes through the body's tissue, the hemoglobin releases the oxygen to the cells. The empty hemoglobin molecules then bond with the tissue's carbon dioxide or other waste gases, transporting it away. The Red blood cells develop in about 7 days and live a total of about 120 days and eventually die as they get worn out. The bones in a human body actually produce the RBC's. Even though the blood is circulated in our body, it is not made all the time.
Structure of small red blood cells
The diameter of a typical human erythrocyte disk is 6-8 µm, much smaller than most other human cells, a typical erythrocyte contains about 270 million hemoglobin molecules, with each carrying four heme groups. Adult humans have roughly 2-3 × 1013 red blood cells at any given time (women have about 4 million to 5 million erythrocytes per cubic millimeter (micro liter) of blood and men about 5 million to 6 million; The red blood cells store collectively about 3.5 grams of iron, more than five times the iron stored by all the other tissues combined. The process by which red blood cells are produced is called erythropoiesis. Erythrocytes are continuously being produced in the red bone marrow of large bones. The aging cells swell up to a sphere-like shape and are engulfed by phagocytes, destroyed and their materials are released into the blood. The main sites of destruction are the liver and the spleen. The heme constituent of hemoglobin is eventually excreted as bilirubin.
The blood types of humans are due to variations in surface glycoprotein of erythrocytes. Since human body is continuously making more blood, it is safe for healthy adults to donate blood. The blood is then stored for emergency situations. Initially after giving the blood, the donor may feel some momentary light headedness due to the loss of the oxygen rich red blood cells and blood sugar. But the body quickly stabilizes itself.
Blood Cell- What is a blood cell?
Blood is a circulating fluid. Blood cell is any type of blood found in the blood or plasma. In mammals blood also known as plasma is made up of three types of blood cells. Namely, the red blood cells, the white blood cells and platelets. The main...
White Blood Cells
The WBC's as they are commonly known are also called as Leukocytes or white cells or white corpuscles. White blood cells include neutrophils, eosinophils, basophils, lymphocytes, and monocytes. They are a group of several cell types that occur in...
Symptoms of low White Blood Cell count- Major Reasons of Less Blood Count
They are called as the antibodies that actually form a human immune system. Commonly known as Leukocytes or white cells or white corpuscle, the white blood cells are a group of several cell types that occur in bloodstream and are essential for...
Shape Of Red Blood Cells-The different kinds
What are Erythrocytes? Erythrocytes are the most common type of cells present in blood. Blood is a connective tissue composed of fluid plasma and blood cells. The blood cells include Erythrocytes (red blood cells), Leucocytes (White blood...
Low Red Blood Cell Count- A dangerous condition
The red blood cells are the most common type of cells. They are also called as RBC's or enthrocytes. They are the principal means of delivering oxygen from lungs to the tissues. A single drop of blood contains millions of red blood cells. If they...
|
|
|
|
|
