ANATOMY

Detailed explanation-1: -Types of immunity: Active natural: Body produces antibodies in response to exposure to a live pathogen. Active artificial: Body produces antibodies in response to a vaccine. Passive natural: Antibodies are passed from the mom to her baby through the placenta and breastmilk.

Detailed explanation-2: -The main components of the immune system are the thymus, spleen, Lymph Nodes, bone marrow and white blood cells. A brain is not involved in elicitation of immune response but regulates the function of the whole body.

Detailed explanation-3: -Fibrinogen is involved in blood clotting process. Phagocytes are the component of non-specific immune response and kill the pathogens that invade the body. Phagocyte cell engulfs the pathogen like bacteria or other small cells and digests them e.g., macrophage cells. Thus, the correct answer is D.

Detailed explanation-4: -Eat Well. Food Assistance. Be Physically Active. Regular physical activity helps you feel better, sleep better, and reduce anxiety. Maintain a Healthy Weight. Excess weight can affect how your body functions. Get Enough Sleep. Quit Smoking. Avoid Too Much Alcohol. In Summary.