What is the purpose of white and red blood cells?

White blood cells (WBCs), also known as leukocytes, are cells in the immune system that help protect the body against infections and diseases. Red blood cells (RBCs), also known as erythrocytes, carry oxygen throughout the body and remove carbon dioxide.

Here are the main functions of white blood cells:

* Phagocytosis: WBCs can engulf and destroy foreign particles, bacteria, viruses, and other harmful substances.

* Antigen presentation: WBCs present antigens (markers of foreign substances) on their surface, enabling other immune cells to recognize and attack them.

* Inflammation: WBCs release chemical signals that trigger inflammation, which helps isolate infections and promote healing.

* Antibody production: Some WBCs produce antibodies that specifically target and neutralize pathogens.

Here are the primary functions of red blood cells:

* Oxygen transport: RBCs contain a protein called hemoglobin, which binds to oxygen in the lungs and transports it to tissues throughout the body.

* Carbon dioxide transport: RBCs carry carbon dioxide, a waste product of cellular respiration, back to the lungs to be exhaled.

* Buffering: RBCs help regulate the pH of blood by absorbing or releasing hydrogen ions.

* Blood viscosity: RBCs contribute to the viscosity (thickness) and flow characteristics of blood.