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Science Ch 3

Human Body Systems

digestion breaking down food into simpler substances that your body can use
saliva a watery fluid that softens and moistens food
esophagus the long muscular tube that brings food into the stomach
stomach a muscular organ that changes food into a thick soupy liquid
small intestine the organ that completes digestion and allows digested food to enter the blood
large intestine the thick tube-like organ that removes undigested waste
diaphragm a large, flat muscle that pulls air in and pushes air out of the lungs
lung one of the two organs that fills with air when you inhale
alveoli air sacs in the lungs where gases move into and out of the blood
capillary a tiny blood vessel
heart a muscular organ that constantly pumps blood throughout the body
artery a thick-walled blood vessel that carries blood away from the heart
vein a blood vessel that carries blood back to the heart
kidney an organ that filters certain body wastes out of the blood
bladder an organ that stores liquid wastes from the kidneys temporarily
nephron a part of the kidneys where waste materials are separated from useful materials in the blood
Created by: Our Class