Enter the correct term in the blanks. a. The circulatory system is made up of the heart plus all of the and .

b. When we breathe, a large muscle called the helps us draw oxygen into our lungs.

c. The filter our blood.

d. The right side of the heart pumps blood only to the .

e. The human heart has chambers.

f. The top chambers of the heart are each called the .

g. The bottom chambers of the heart are each called the .

h. The liquid part of the blood is called .

i. The system breaks down food for the body's cells.

j. Digestion begins in the with the teeth and .

k. The liver produces , which acts on fat.

l. The system is the body's garbage service.

m. The are the main excretory organs.