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8th Ch. 13-1 & 2--2

Horizontales
The act of responding or reacting to a change in the environment
Destroys a pathogen by surrounding it and breaking it down
Lymphocytes made in the thymus gland
Substances that send the immune system into action
Verticales
Lymphocytes made in the bone marrow
One celled organisms that are more complex than bacteria
Germs that cause disease
Lymphocytes that are "natural killer" cells; attack cancer and viruses