What is blood ? what is tha function of WBC ? ​

White blood cells are also called leukocytes. They protect you against illness and disease. Think of white blood cells as your immunity cells. In a sense, they are always at war. They flow through your bloodstream to fight viruses, bacteria, and other foreign invaders that threaten your health.

The main function of WBCs is to defend and fight with the infections in the human body. WBCs also produce a special protein known as the antibody. The main function of this protein is to recognize the presence of foreign elements in the body and fight them.

Blood has many different functions, including: transporting oxygen and nutrients to the lungs and tissues. forming blood clots to prevent excess blood loss. carrying cells and antibodies that fight infection.

Carbohydrates,fats and proteins