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Choosing Good Health
Chapters 5 and 6
Term | Definition |
---|---|
immunity | the body's ability to resist a particular disease |
pathogens | bacteria and viruses that cause disease |
skin | largest organ of the body |
mucous membrane | lines your mouth, nose, and throat |
cilia | hairlike projections that line the mucous membrane |
hydrochloric acid | chemical which destroys most of the harmful bacteria in your stomach |
lysozyme | enzyme that kills bacteria in your tears and perspiration |
cerebrum | largest part of the brain that controls thinking, reasoning, and memory |
central nervous system | consists of the brain and spinal cord |
olfactory | nerves that help you smell |
auditory nerve | nerves that help you hear |
auditory canal | outer ear to the eardrum canal that carries sound waves |
nerves | wires of your communication system |
lymph vessels | transportation tubes for lymph |
lymph nodes | enlarges bunches of lymphatic tissues |
lymphocytes | white blood cells inside lymph nodes |
spleen | largest lymphatic organ |
sclera | outer layer of the eye |
iris | gives the eye its color |
eye socker | hollow space in skull that surrounds each eye |
pupil | center of the iris through which light passes |
lens | part of the eye that thickens with close objects and thins with far away objects |
optometrist | person trained to examine eyes and prescribe glasses |
cerebellum | part of the brain that helps with balance and coordination |
spinal cord | bundle of nerve fibers that extend from the brain stem to the lower part of the back |
left hemisphere | part of the brain that communicates with the right side of the body |
outer ear | part of the ear that catches sound |
eardrum | thin membrane that separates the outer ear from the middle ear |
reflex actions | unconscious actions such a jerking your hand from something that is hot |
motor nerve fibers | sends orders for action from the brain and spinal cord to the muscles |