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Human Body Systems Ch 3
Interactive Science Series
29
Science
8th Grade
08/25/2017

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Cards

Term
calorie
Definition
the amount of energy needed to raise the temperature of one gram of water by one degree Celsius
Term
nutrients
Definition
substances in food that provide the raw materials and energy the body needs to carry out all its essential processes
Term
carbohydrates
Definition
a major source of energy, made of carbon, hydrogen, and oxygen
Term
glucose
Definition
the major source of energy for your body's cells
Term
fats
Definition
energy-containing nutrients composed of carbon, oxygen, and hydrogen
Term
proteins
Definition
nutrients that contain nitrogen as well as carbon, hydrogen, and oxygen
Term
amino acids
Definition
small linked units that make up proteins
Term
vitamins
Definition
act as helper molecules in your body's chemical reactions
Term
minerals
Definition
nutrients not made by living things
Term
Percent Daily Value
Definition
shows how the nutrients in one serving fit into a 2,000 Calorie a day diet
Term
Dietary Reference Intakes
Definition
provide guidelines based on the type of nutrient and the age and sex of a person
Term
digestion
Definition
the process by which your body breaks down food into small nutrient molecules
Term
absorption
Definition
the process by which nutrient molecules pass through the wall of your digestive system into your blood
Term
saliva
Definition
the fluid released by the salivary gland when you eat
Term
enzyme
Definition
a protein that speeds up chemical reactions in the body
Term
epiglottis
Definition
a flap of tissue that seals off your windpipe and prevents food from entering the lungs
Term
esophagus
Definition
a muscular tube that connects the mouth to the stomach
Term
mucus
Definition
a thick, slippery substance produced by the body
Term
peristalsis
Definition
involuntary muscle contractions
Term
stomach
Definition
a J-shaped muscular pouch in the abdomen
Term
small intestine
Definition
part of the digestive system where most chemical digestion takes place
Term
liver
Definition
one of its jobs it to make bile for the digestive system
Term
bile
Definition
a substance that breaks up fat particles
Term
gallbladder
Definition
where bile is stored
Term
pancreas
Definition
a triangular organ located between the stomach and the first part of the small intestine
Term
villi
Definition
tiny, finger shaped structures that help absorb nutrients
Term
large intestine
Definition
the last section of the digestive system that prepares waste for elimination
Term
rectum
Definition
waste material is compressed into solid form
Term
anus
Definition
a muscular opening at the end of the rectum
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