Answer:
The immune response is how your body recognizes and defends itself against bacteria, viruses, and substances that appear foreign and harmful.
Information
The immune system protects the body from possibly harmful substances by recognizing and responding to antigens. Antigens are substances (usually proteins) on the surface of cells, viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles (such as a splinter) can also be antigens. The immune system recognizes and destroys, or tries to destroy, substances that contain antigens.
Your body's cells have proteins that are antigens. These include a group of antigens called HLA antigens. Your immune system learns to see these antigens as normal and usually does not react against them.
Answer:
physical contamination
Explanation:
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Answer:
Stretching increases your range of motion and prevents injury and muscle strains. “Adequate warm-up has been shown to lower risk of injury for land sports and water sports,” says Weber. Water safety: Wear a life jacket when you're on or in the water. Even the best swimmers can become fatigued and get into trouble.
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<span>Human behavior plays a central role in the maintenance of health, and the prevention of disease. With an eye to lowering the substantial morbidity and mortality associated with health-related behavior, health professionals have turned to models of behavior change to guide the development of strategies that foster self-protective action, reduce behaviors that increase health risk, and facilitate effective adaptation to and coping with illness. Several decades of concerted effort to promote health and decrease risk through individual behavior change have produced successes, failures, and lessons learned.</span>
