Question

Circulatory system function: What is the primary function of the circulatory system?

a) To break down food within the body
b) To produce blood cells for use throughout the body
c) To send signals throughout the body
d) To transport blood within the body

Answer 1

The primary function of the circulatory system is to transport blood within the body, delivering oxygen and nutrients while removing wastes, maintaining homeostasis, and performing defense functions.

Step-by-step explanation:

The primary function of the circulatory system is d) To transport blood within the body. This complex network, consisting of the heart, blood vessels, and blood, serves to deliver oxygen and nutrients to the cells of the body while also removing carbon dioxide and waste products. Oxygen enters the blood through diffusion in the lungs, after which the heart pumps this oxygenated blood around the body to facilitate cellular respiration and tissue metabolism. Moreover, the circulatory system plays a crucial role in maintaining homeostasis, including defense against pathogens, distribution of heat to regulate body temperature, and balance of body pH levels. Blood components such as red blood cells (RBCs) are integral for carrying oxygen, white blood cells (WBCs) are important for immune defense, and platelets and plasma are crucial for clotting and fluid balance.