7th Science - Ch. 7 "human Body Systems"
Terms in this set (20)
unit of measurement of the amount of energy in food
to discover the presence of
steady internal conditions when external conditions change
protection from infection or toxins
type of white blood cell that is made in the thymus, the spleen, and bone marrow
part of food that is used by the body to grow and survive
group of organs that work together and perform a
long chain of amino acid molecules
tube in the body that carries fluid such as blood
hard outer layer of bone
chemical signal that is released by the organs of the endocrine system
basic unit of the nervous system; nerve cell
Automatic movement in response to a signal
interior region of bone that contains many tiny holes
joining of an egg and sperm
Human reproductive cells
the process by which new organisms are produced
cell that forms when an egg and a sperm join together
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Chapter 7 vocab
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Science Chapter 7 Human Body System
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