What Is a Contract

question 20

Essay

What is a contract?

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Definitions:

Immune Response

The body's defensive reaction to eliminate pathogens or foreign substances.

Natural Killer Cells

Natural Killer Cells are a type of lymphocyte in the immune system that can recognize and destroy cancerous or virus-infected cells without prior sensitization.

Lymphatic Vessels

Part of the lymphatic system, these vessels carry lymph fluid throughout the body, aiding in the removal of toxins and waste.

Digestive Tract

The series of hollow organs joined in a long, twisting tube from the mouth to the anus, where digestion and absorption of food occurs.