Cardiovascular system

Which of the following best describes the main function of the circulatory system?

• To deliver nutrients and other essential materials to cells and remove waste products

• To break down the nutrients found in food so that they can be used by all cells in the body

• To produce the chemical signals that allow parts of the body to communicate over long distances

• To coordinate all other body systems so that they can function together to maintain homeostasis

Sonia is studying where oxygen goes in the body. She investigates how oxygen moves from the bloodstream into the cells. Which structure is Sonia most likely to examine in this work?

• The veins

• The heart

• The capillaries

• The lymph nodes

Pulmonary circulation is when blood flows through the ____________ to the _____ and back to the _______.

• Heart, lungs, heart

• Lungs, heart, lungs

• Heart, kidneys, heart

• Lungs, kidneys, heart

These blood vessels carry blood away from the heart.

• Capillaries

• Veins

• Arteries

• Coronary valves

Another name for high blood pressure is _________.

• Hyperthyroid

• Hypertrophy

• Hysteria

• Hypertension

Blood flows from right atrium to right ventricle through which valve?

• semilunar valve
• tricuspid valve
• bicuspid valve
• pulmonary valve 

The three layers of the heart are as follows:

• Myocardium,pericardium,endocardium
• Myocardium,epicardium,endocardium
• Myocardium,endocarditis,endocardium
• Myocardium,exocardium,pericardium

Double membrane sac that covers the outside of the heart

• Pericardium
• Myocardium
• Endocardium
• All of the above

_______starts in the heart and causes the heart muscle to contract and the heart to beat

• Enzymes
• Electrical impulses
• Hormones
• Neurons

The left side of the heart pumps deoxygenated blood

• True
• False