The body's response to foreign particles, such as the production of antibodies directed against a specific antigen, is called:
Immunity is the ability to resist damage from:
The study of foreign particles that can affect the living body and the defence mechanisms is called:
The first line of defence comprises:
The first line of defence includes:
The second line of defence consists of:
The first line and second line of defence together make:
The third line of defence includes:
The skin is made up of two layers: the:
The protein that strengthens skin cells is:
