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1st Semester Review
7th Grade Science 1st semester vocabulary
| Term | Definition |
|---|---|
| urinary system | the body system responsible for the removal or urea, salts and excess water |
| kidneys | organs that filter urea, salt and excess water from the blood; made up of nephrons |
| bladder | organ that stores urine until it is released outside the body |
| esophagus | tube that carries food from the mouth to the stomach |
| stomach | organ in the digestive system that breaks down food with acid and movement |
| muscles | tissues that allow internal (smooth muscle) and external movement (skeletal muscle) |
| skeletal system | body system responsible for movement, blood cell production, storage, protection and structure |
| digestive system | body system that processes food to extract nutrition and energy for cells |
| muscular system | body system that provides movement and protection |
| epidermis | outermost layer of skin, constantly shedding epithelial cells |
| integumentary sytem | body system that provides protections by covering entire body |
| blood cells | cells in the circulatory system that help carry nutrients and needed supplies to all body cells |
| diaphragm | muscle in the torso that creates air pressure changes so you can breathe |
| lung | an organ of the respiratory system that handles the exchange of carbon dioxide and oxygen |
| respiratory system | body system that takes in oxygen and expels waste carbon dioxide |
| brain | organ of the nervous system that controls all body functions |
| circulatory system | body system that handles transport of all needed supplies to all cells of the body |
| hormones | chemicals secreted in glands that are released as needed to assist in bodily functions |
| endocrine system | body system that sends chemical messages to different systems as needed |
| reproductive system | body system that creates new members of the species |
| nervous system | body system that controls and coordinates all bodily functions |
| cell membrane | gatekeeper of the cell; decides what gets in and out; all cells have one |
| cytoplasm | gel like substance that holds all the organelles in place |
| cell wall | outer structure of plant cells that provides extra structure |
| pupil | inner part of the eye that controls how much light gets in |
| external | on the outside |
| internal | on the inside |
| stimuli | something that produces a response; can be internal or external |
| response | reaction to a stimuli; eg. jump when you hear a loud noise - the noise is the stimulus, the jump is the response |
| ear canal | tube in your ear that sound enters through |
| goiter | a growth on your thyroid |
| gizzard | a special part of a bird's digestive system |
| enzymes | chemicals the pancreas produces to aid in the chemical digestion of food |
| chyme | the mixture of acid and food that moves from your stomach into your small intestine |
| secretions | fluids released by the body such as saliva |
| gland | an organ of the endocrine system that produces hormones; each gland produces a specific hormone |
| reflex | an involuntary reaction to a stimulus |
| valve | a tissue that temporarily blocks an opening; e.g. epiglottis |
| organic compound | a compound that contains carbon and one of the Fab Five (hydrogen, nitrogen, oxygen, sulfur, phosphorus) |
Created by:
bwilliamsscience
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