Human Body Systems

Question 1

digestion

Answer 1

breaking down food into simpler substances that your body can use

Question 2

saliva

Answer 2

a watery fluid that softens and moistens food

Question 3

esophagus

Answer 3

the long muscular tube that brings food into the stomach

Question 4

stomach

Answer 4

a muscular organ that changes food into a thick soupy liquid

Question 5

small intestine

Answer 5

the organ that completes digestion and allows digested food to enter the blood

Question 6

large intestine

Answer 6

the thick tube-like organ that removes undigested waste

Question 7

diaphragm

Answer 7

a large, flat muscle that pulls air in and pushes air out of the lungs

Question 8

lung

Answer 8

one of two organs that fills with air when you inhale

Question 9

alveoli

Answer 9

air sacs in the lungs where gases move into and out of the blood

Question 10

capillary

Answer 10

a tiny blood vessel

Question 11

heart

Answer 11

a muscular organ that constantly pumps blood throughout the body

Question 12

artery

Answer 12

a thick-walled blood vessel that carries blood away from the heart

Question 13

vein

Answer 13

a blood vessel that carries blood to the heart

Question 14

kidney

Answer 14

an organ that filters certain body wastes out of the blood

Question 15

bladder

Answer 15

an organ that stores liquid wastes from the kidneys temporarily

Question 16

nephron

Answer 16

a part of the kidneys where waste materials are separated from useful materials in the blood