Circulatory System

The cardiovascular system helps maintain homeostasis by

• sending hunger signals to the brain when energy is low.

• slowing down to reduce blood pressure when resting.

• increasing breathing to raise blood pH.

• filtering out more water for waste excretion.

Coronary circulation, is the flow of blood to the tissues of the ______.

• brain
• heart
• liver
• lungs

A heart attack can occur if an artery in the _________ is clogged.

• brain

• heart

• liver

_______, the liquid part of the blood, is mostly made of water.

• plasma

• platelets

• hemoglobin

Hemoglobin picks up and carries both _______.

• carbon dioxide and oxygen

• carbon dioxide and waste

• nutrients and carbon dioxide

_______ help clot blood.

• red blood cells

• platelets

• white blood cells

The ______ fight bacteria and viruses.

• red blood cells

• platelets

• white blood cells

What connects veins and arteries?

• platelets

• lymph vessels

• capillaries

The force of blood on the walls of blood vessels is called ?

• atherosclerosis

• blood pressure

• hypertension

Which of the following is NOT a function of the circulatory system?

• transport nutrients and remove waste

• fight disease

• breakdown food for nutrients

• deliver oxygen and remove carbon dioxide