IMMUNOLOGY

Detailed explanation-1: -The blood cells include white blood cells which function in the immune system and red blood cells which transport oxygen and carbon dioxide. The fluid part of the blood (the plasma) transports hormones, nutrients, and waste products.

Detailed explanation-2: -The endocrine system is a system of ductless glands that secrete hormones directly into the circulatory system to be carried long distances to other target organs that regulate key body and organ functions.

Detailed explanation-3: -Capillaries: These blood vessels connect very small arteries (arterioles) and veins (venules). Capillaries have thin walls that allow oxygen, carbon dioxide, nutrients and waste products to pass into and out of cells.

Detailed explanation-4: -Plasma, the liquid part of blood to transport nutrients, proteins and hormones throughout the body.

Detailed explanation-5: -The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart.

Detailed explanation-6: -Blood carries oxygen and nutrients to the body’s cells, and carries waste materials away. Blood also carries hormones, which control body processes, and antibodies, to fight invading germs. The heart is the pump that keeps this transport system moving.