Levels of Organization in the Human Body

Front

The levels of organization in the human body

Back

Cells, tissues, organs, and organ systems

Front

Basic unit of structure and function in living things

Back

Cell

Front

Forms the outside boundary of the cell

Back

Cell membrane

Front

Control center of the cell

Back

Nucleus

Front

Area between the cell membrane and nucleus

Back

Cytoplasm

Front

Group of similar cells performing the same function

Back

Tissue

Front

Four basic types of tissue in the human body

Back

Muscle, nerve, connective, epithelial

Front

Tissue that can contract or shorten

Back

Muscle tissue

Front

Carries messages between the brain and body

Back

Nerve tissue

Front

Provides support and connects body parts

Back

Connective tissue