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1st Semester Review

7th Grade Science 1st semester vocabulary

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