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Human Biology & Health Ch 1 Section 1 and 2

cell basic unit of structure and function in a living thing
cell membrane forms the outside boundary of the cell
nucleus the control center that directs the cell's activities and contains the information that determines the cells form and function
cytoplasm clear, jellylike substance containing many cell structures called organelles
tissue a group of similar cells that perform the same function
muscle tissue can contract and shorten, the muscle tissue make parts of your body move
nervous tissue directs and controls the process,& carries electrical messages back and forth between the brain and other parts of the body
connective tissue provides support for your body and connect all its parts, examples are bone and fat tissues
epithelial tissue protects the delicate structures of the body; skin is epithelial tissue. the lining of your digestive system is also epithelial tissue that allows you to digest and absorb nutrients in your food
organ is a structure that is composed of different kinds of tissue and performs a specific job
organ system a group of organs that work together to perform a major function
homeostasis the process in which the body is kept stable in spite of the changes in the external environment
stress the reaction of your body to potentially threatening , challenging or disturbing events
skeleton is made up of all the bones in your body
vertebra the 26 small bones that make up your backbone
joint is a place in the body where two bones come together
ligament strong connective tissue that holds bones together
cartilage a connective tissue that is more flexible than bone and that protects the ends of bones and keep them from rubbing each other
compact bone hard, dense bone tissue that is beneath the outer membrane of a bone
spongy bone a layer of bone tissue having many small spaces and found just inside the layer of compact bone
marrow the soft connective tissue that fills the internal spaces in bone
osteoporosis a condition in which the body's bones become weak and break easily
Created by: mrsschaaf
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