Internal and external structures

Front

What is an internal structure?

Back

An internal structure is a part of an organism that is located inside its body, such as bones, organs, and tissues.

Front

Which part of the body is an example of an internal structure?

Back

Skull

Front

What is an external structure?

Back

An external structure is a part of an organism that is located outside its body, such as skin, fur, or feathers.

Front

Which part of the body is an example of an external structure?

Back

Trunk of an elephant

Front

What does the heart do?

Back

The heart pumps blood and oxygen through the entire body.

Front

What is the basic structural and functional unit of all living things?

Back

Cell

Front

What are bones?

Back

Bones are hard structures that protect the organs and provide support to the body.

Front

What is the function of the lungs?

Back

The lungs help in breathing by taking in oxygen and removing carbon dioxide.

Front

What is the role of muscles in the body?

Back

Muscles help in movement and support the body.

Front

What are tusks?

Back

Tusks are long, pointed teeth that some animals, like elephants, use for digging and lifting.