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5A Ch 1 Vocabulary

TermDefinition
cell The basic unit of structure and function of all living things
cell membrane The thin covering that encloses a cell and holds its parts together
nucleus The organelle that controls all of a cell’s activities. The center of an atom
cytoplasm A jellylike substance containing many chemicals that keep a cell functioning.
diffusion The process by which many materials move in and out of cells
osmosis The diffusion of water and dissolved materials through cell membranes
tissue Cells that work together to form a specific function
organ Tissues that work together to perform a specific function
system Organs that work together to perform a function
capillaries The smallest blood vessels
alveoli Tiny air sacs located at the ends of bronchi in the lungs
nephrons Tubes inside the kidneys where urea and water diffuse from the blood
bone marrow A connective tissue that produces red and white blood cells
ligaments One of the bands of connective tissue that hold a skeleton together
joints A place where bones meet and are attached to each other and to muscles
tendons Tough bands of connective tissue that attach muscles to bones
neurons A specialized cell that can receive information and transmit it to other cells
villi The tiny tubes sticking into the small intestine
receptors Nerve cells that detect conditions in the body’s environment
Created by: mbeisert
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