AP BIOLOGY

Detailed explanation-1: -White blood cells (leukocytes). These help fight infections and aid in the immune process.

Detailed explanation-2: -White blood cells are responsible primarily for defending the body against infection. There are five main types of white blood cells.

Detailed explanation-3: -Some directly fight intruders. They are attracted towards the infective agents, then surround and engulf them. Once inside the cell, these white cells then release chemicals that break the organism down and destroy it. Other white cells, called lymphocytes, target attacks in another way, by making antibodies.

Detailed explanation-4: -The immune system helps in fighting against infections.

Detailed explanation-5: -White blood cells are part of the body’s immune system. They help the body fight infection and other diseases. Types of white blood cells are granulocytes (neutrophils, eosinophils, and basophils), monocytes, and lymphocytes (T cells and B cells).