What are the four general components of blood?

What are the four general components of blood?

• A. Plasma - Fluid Component Of Blood That Carries A Little Bit Of Oxygen; White Blood Cells - Fight Infection; Platelets - Initiate Blood Clotting; Red Blood Cells - Carry Oxygen To The Various Organs And Tissues Of The Body
• B. Plasma; White Blood Cells; Red Blood Cells; Platelets
• C. White Blood Cells; Platelets; Oxygen; Plasma
• D. Water; Plasma; White Blood Cells; Platelets

Answer: (A)

Blood has four general components: plasma, red blood cells, white blood cells, and platelets. Plasma is the fluid portion that transports nutrients, hormones, waste, and clotting factors. Red blood cells carry oxygen from the lungs to tissues throughout the body. White blood cells defend against infection and support immune function. Platelets are small fragments that help form clots to stop bleeding. The option that names these four components and also briefly describes what each does is best because it clearly reflects both the composition of blood and the roles each part plays in oxygen transport, immunity, and clotting. Other choices introduce elements that aren’t separate components of blood—oxygen is carried by red blood cells, not a standalone component, and simply listing water as a component overlooks plasma’s actual makeup.

Blood has four general components: plasma, red blood cells, white blood cells, and platelets. Plasma is the fluid portion that transports nutrients, hormones, waste, and clotting factors. Red blood cells carry oxygen from the lungs to tissues throughout the body. White blood cells defend against infection and support immune function. Platelets are small fragments that help form clots to stop bleeding. The option that names these four components and also briefly describes what each does is best because it clearly reflects both the composition of blood and the roles each part plays in oxygen transport, immunity, and clotting. Other choices introduce elements that aren’t separate components of blood—oxygen is carried by red blood cells, not a standalone component, and simply listing water as a component overlooks plasma’s actual makeup.