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.