7th Grade Science Study Guide
The basic unit of structure.
Forms the outside boundary of a cell.
The control center of a cell that directs the cell’s activities.
Substance inside the cell containing the cell’s organelles.
A group of muscular cells that perform the same functions.
Contracts to help the body move.
Directs and controls the body’s processes.
Provides support for the body.
Protects delicate structures that lie underneath the skin.
A structure composed of different kinds of tissues.
A group of organs that work to perform a major function.
The body’s tendency to maintain an internal balance.
Reaction of the body to potentially threatening, challenging, or disturbing events.
Made up of all the bones in a body.
Makes up your backbone, allowing you to bend.
A place in the body where two bones meet.
Connective tissue that holds two bones together.
A second type of connective tissue which is more flexible than bone.
Layer beneath the bone’s membrane.