Question

What is the full form of RBCs?

Answer 1

Often referred to as erythrocytes, the cellular portion of blood, millions of which give the blood its distinctive colour in the circulation of vertebrates and bring oxygen from the lungs to the tissues. The mature human RBCS is short, round, and biconcave; its profile appears dumbbell-shaped.

Complete answer:
Red blood cells (RBCs), also referred to as red blood cells, red blood corpuscles (in humans or other animals not possessing a red blood cell nucleus), haematodes, erythroid cells or erythrocytes (from Greek erythros for red blood cells and hollow vessel kytos for modern use), are the most common type of blood cells and the primary means of delivery of oxygen ( O2) by vertebrates. In the lungs, or in fish gills, RBCs suck up oxygen and release it into tissues while squeezing through the capillaries of the body.
The erythrocyte cytoplasm is rich in haemoglobin, a biomolecule containing iron that is capable of binding oxygen and responsible for the red colour of cells and blood. About 270 million of these haemoglobin molecules are found in each human red blood cell. The cell membrane is made up of proteins and lipids, and this structure provides important properties for the function of physiological cells, such as deformability and stability, when moving through the circulatory system and particularly the capillary system.

Additional Information: In humans, mature red blood cells are biconcave discs that are flexible and oval. In order to accommodate the full space for haemoglobin, they lack a cell nucleus and most organelles; they can be seen as haemoglobin bags, with a plasma membrane as the sac. In human adults, approximately 2, 4 million new erythrocytes are produced per second.
The cells mature in the bone marrow and circulate in the body for around 100-120 days until macrophages recycle their components. Each movement takes approximately 60 seconds (one minute). 20-30 trillion red blood cells are about 84 % of the cells in the human body. Red blood cells are about half the volume of the blood (40 %to 45 %).

Note: Red blood cells, or erythrocytes, are mainly responsible for bringing oxygen from the lungs to the tissues of the body and carbon dioxide as a waste product, away from the tissues and back to the lungs. In red blood cells, haemoglobin (Hgb) is an essential protein which carries oxygen from the lungs to all parts of our body.