Lesson 1: Cells

Front

Atom

Back

The smallest particle of an element that retains the identity of the element.

Front

Molecule or Compound

Back

Two or more different elements combined together (compound) OR one or more atoms of the same element combined together (molecule).

Front

Organelle

Back

A specialized structure in a cell.

Front

Cell

Back

The smallest unit that can perform the functions of life.

Front

Tissue

Back

A group of similar cells that share the same structure and function.

Front

Organ

Back

A combination of several types of tissues working together to perform a specific function.

Front

Organ System

Back

A group of organs functioning together.

Front

Organism

Back

A group of organ systems functioning together.

Front

4 characteristics of living things

Back

1) Living organisms obtain and use energy to power activities such as movement and growth.

2) They try to maintain a constant internal environment.

3) Living organisms reproduce.

4) They are made of cells.

Front

The Cell Theory

Back

1. All living organisms are made of one or more cells.

2. The cell is the basic organizational unit of life.

3. All cells come from pre-existing cells.