Under the Microscope- Lesson 1

Front

What is the digestive system?

Back

A body system composed of organs, such as the stomach and large intestine, that breaks down food to extract nutrients, absorb them into the bloodstream, and excrete unused solids from the body as waste.

Front

What is the nervous system?

Back

A network of nerve cells in the body that gathers information and helps body parts communicate with each other, organized into two main parts—the central nervous system (spinal cord and brain) and the peripheral nervous system (found in organs and limbs).

Front

What is an organ?

Back

A body structure that performs a specialized function, such as the lungs, heart, liver, or kidneys, and may have smaller structures within it.

Front

What does 'function' mean in biological terms?

Back

The purpose, role, or job of a person or thing.

Front

What are cells?

Back

The basic building block of life—all living things are made up of one or more cells.

Front

What is the role of the excretory system?

Back

To remove waste products from the body and regulate water and electrolyte balance.

Front

What is the central nervous system?

Back

The part of the nervous system that includes the brain and spinal cord.

Front

What is the peripheral nervous system?

Back

The part of the nervous system that includes all the nerves outside the central nervous system, connecting the brain and spinal cord to the rest of the body.

Front

What is the function of the lungs?

Back

To facilitate the exchange of oxygen and carbon dioxide between the body and the environment.

Front

What is the function of the heart?

Back

To pump blood throughout the body, supplying oxygen and nutrients to tissues and removing waste products.