Heart, lungs, and brain are ___ structures of animals.

Something an animal has or does that helps it survive is called a(n) _____

Structures that are found inside an organism's body

An example of an INTERNAL animal structure is

Different types of bird beaks are an example of

The hard shell on a turtle helps it to

Which internal structure in fish is primarily responsible for buoyancy control?

What is the main function of the alveoli in the human lungs?

In which part of the plant does photosynthesis primarily occur?

Which internal structure in birds is adapted for grinding food?

What adaptation allows camels to survive long periods without water?

Which internal structure in mammals is responsible for filtering waste from the blood?

What is the primary function of the large intestine in the human digestive system?

Which internal structure in plants is responsible for transporting nutrients and water?