punavererakkudes
Punavererakkudes, also known as erythrocytes or red blood cells, are the most common type of blood cell in vertebrates. They are responsible for transporting oxygen from the lungs to the body's tissues and carrying carbon dioxide from the tissues back to the lungs. Red blood cells are biconcave discs, meaning they are flattened discs that are indented on both sides. This shape increases their surface area, allowing for more efficient gas exchange.
In mammals, mature red blood cells lack a nucleus and most organelles, which maximizes the space available
The number of red blood cells in the blood is a critical indicator of health. A low