Colorado Esthetician Written Practice Exam

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Which system controls the steady circulation of blood through the body?

Endocrine
Circulatory
Excretory
Integumentary

The correct answer is: Endocrine

The endocrine system is responsible for production and secretion of hormones that regulate various bodily functions, including the circulation of blood. The circulatory system is responsible for the delivery of nutrients and oxygen to cells and the removal of waste products, but it does not directly control the circulation of blood. The excretory system is responsible for eliminating waste and regulating water and electrolyte balance, but it also does not directly control blood circulation. The integumentary system, which includes the skin, plays a role in thermoregulation and protection, but it is not responsible for controlling the circulation of blood.