25 terms

Unit 2: Body Systems

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Carbohydrates
molecule made up of carbon, hydrogen and oxygen; chemically broken down into sugars during digestion
Chemical Change
change that results in the formation of a new substance with different properties; cannot be undone by physical means
Chemical Digestion
the breaking of chemical bonds in complex molecules to form smaller, simpler molecules (ex: carbohydrates into sugars)
Circulatory System
transports nutrients and oxygen to the body
Digestive System
breaks down food to provide nutrients and energy
Endocrine System
regulates the body with hormones
Excretory System
removes waste from the body
External Stimulus
a change in the environment outside of the organism
Feedback Mechanism
a response within a system that influences the activity of the system
Force
a push or pull that can change the position or motion of an object/material
Homeostasis
the body's ability to keep it's internal balance stable
Integumentary System
provides protection for the body
Internal Stimulus
a change within the organism
Mechanical Digestion
physical breakdown of food into smaller pieces (chewing and/or grinding)
Molecule
smallest unit of a compound
Motion
a change in the position of an object
Muscular System
provides movement for the body
Nervous System
controls and coordinates all of the other systems of the body
Physical Change
change in the physical properties that does not alter the identity of the substance
Reproductive System
produces offspring
Respiratory System
exchanges oxygen and carbon dioxide
Skeletal System
provides structure and protection for the body
Stable
balanced; unchanging
Stimulus
something that causes a response or reaction
System
interacting elements that work together to form something more complex