LS.5.1.1 Levels of Organization and Body Systems

Front

What are multicellular organisms?

Back

Living things made up of more than one cell, like humans, animals, and plants.

Front

What is the smallest unit of life in the body?

Back

The cell.

Front

What do similar cells working together form?

Back

Tissues.

Front

What do tissues working together form?

Back

Organs.

Front

What do organs working together form?

Back

A body system (also called an organ system).

Front

What is the correct order from smallest to largest: cell, organ, body system, tissue?

Back

Cell → Tissue → Organ → Body System

Front

Give an example of a body system and one of its organs.

Back

The digestive system includes the stomach.

Front

What is the main function of the digestive system?

Back

To break down food so the body can absorb nutrients.

Front

What is the main function of the respiratory system?

Back

To bring oxygen into the body and remove carbon dioxide.

Front

What is the main function of the circulatory system?

Back

To move blood, oxygen, and nutrients through the body.