Functions of Red Cells, Platelets, Plasma, White Cells

Red Blood Cells: These cells have a unique biconcave shape that increases their surface area, facilitating a larger diffusion rate of oxygen. They are packed with a protein called haemoglobin, responsible for the transport of oxygen from the lungs to the tissues of the body. Red blood cells lack a nucleus, allowing more room for haemoglobin.
Platelets: These are small, irregularly-shaped pieces of cells that help in blood clotting. When a blood vessel is cut or damaged, platelets stick together to form a plug that seals the wound, preventing excessive bleeding. They essentially act as a first aid kit, rushing to the site of the damage to initiate repair.
Plasma: This is the yellowish liquid component of blood that holds the blood cells in whole blood suspension. It makes up about 55% of the body’s total blood volume. Plasma is a mixture of water, proteins, waste products, hormones, and nutrients. Its primary function is to transport cells and gases around the body. It also helps regulate body temperature and fight infections.
White Blood Cells: These cells are responsible for defending the body against infectious diseases and foreign materials. They can be classified into two main types: lymphocytes, which create antibodies to defend against bacteria, viruses, and other potentially harmful invaders; and phagocytes, which engulf and digest bacteria and fungi. Unlike red blood cells, white blood cells do have a nucleus and can reproduce.

Remember, understanding the functions of these components of the circulatory system is crucial, as they work together to perform essential tasks such as nutrients, gases and waste products transport, blood clotting, fighting infections, and more.