The body's response to foreign particles, such as the production of antibodies directed against a specific antigen, is called:
The first line of defence comprises:
The first line of defence includes:
The first line and second line of defence together make:
The protein that strengthens skin cells is:
The process of shedding dead skin cells is called:
Phagocytes are white blood cells that destroy abnormal cells or microorganisms by:
The main types of phagocytic white blood cells are:
The complement system consists of over:
The junction between two neurons is called a:
