Question

(3.3.b) bleeding: quiz
one of the major functions of blood is to—
○ transport solid wastes through the body.
○ cleanse dirt and bacteria from wounds via bleeding.
○ help maintain a constant body temperature.
○ create rigidity in limbs and organs through blood pressure.

Explanation:

Blood helps in thermoregulation. It absorbs heat from warmer areas of the body (such as active muscles) and transports it to cooler areas. Blood vessels near the skin's surface can dilate or constrict to release or conserve heat respectively, thus maintaining a constant body temperature. Solid wastes are mainly excreted by the digestive and urinary systems, not transported by blood. Bleeding is not the main way blood cleanses wounds of dirt and bacteria. Blood pressure does not create rigidity in limbs and organs.

Answer:

Help maintain a constant body temperature.