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Unit 2

Unit 2:homeostasis and Body systems

QuestionAnswer
Homeostasis The process by which an organism's internal environment is kept in equilibrium, or stable, in spite of changes in the external environment.
Stimulus A thing or event that causes a response.
External stimulus A change in the environment outside of the organism.
Internal stimulus A change within the organism.
System Interacting, interrelated, or interdependent elements forming a more complex whole.
Stable balanced; unchanging.
Physical change Change which alters matter without changing its chemical composition or the identity of the substance.
Chemical change The formation of a new substance with different properties; cannot be undone by physical means.
Skeletal system Provides structure and protection for the body.
Muscular system Provides movement of the body.
Respiratory system exchanges oxygen and carbon dioxide.
Reproductive system Produces offspring.
Nervous system Controls and coordinates the body
Integumentary system Provides protection of the body. Includes the skin, hair and nails.
Excretory system Removes waste from the body.
Endocrine system Regulates the body with hormones secreted from glands.
Digestive system breaks down food to provide nutrients and energy.
Circulatory system Transports nutrients and oxygen to the body.
Mechanical digestion Physical breakdown of food. grinding and chewing.
Chemical digestion Breaking chemical bonds and rearranging atoms in molecules. When food is broken down using enzymes and gastric juices.
Created by: Davis001
 

 



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