Circulatory system

Question 1

The atria (top chambers) are thin-walled chambers where blood enters the heart.

Answer 1

atria

Question 2

The ventricles (bottom chambers) are thick-walled chambers which push blood away from the heart.

Answer 2

ventricles

Question 3

A blood vessel that carries oxygen-rich blood from the heart to tissues and organs in the body.

Answer 3

artery

Question 4

A blood vessel that carries oxygen-poor blood to the heart from tissues and organs in the body.

Answer 4

vein

Question 5

The smallest type of blood vessel that connects small arteries to small veins.

Answer 5

capillary

Question 6

A wall of tissue that separates the left and right sides of the heart

Answer 6

septum

Question 7

Flaps that are located within the heart that open and close to control the flow of blood. They ensure blood flows in the correct direction, preventing it from flowing backward.

Answer 7

valve

Question 8

thin muscle below the lungs and heart that separates the chest from the abdomen

Answer 8

Diaphragm

Question 9

microscopic balloon-shaped structures located at the end of the respiratory tree.
*They expand during inhalation, taking in oxygen, and shrink during exhalation, expelling carbon dioxide

Answer 9

Alveoli

Question 10

A ureter is a thin tube that carries urine from the kidney to the bladder. Each person has two, one from each kidney.

Answer 10

ureter

Question 11

The urethra is the tube that carries urine from the bladder when you go to the bathroom.

Answer 11

urethra