Plant & Animal Structures and Adaptations Quiz

Internal refers to something situated on the inside of an organism.

Lungs are the primary internal organs responsible for gas exchange and breathing in animals.

External refers to something located on the outside or surface of an organism.

Muscles contract and relax to create movement in our body. They work with bones to help us walk, run, and perform physical activities. Breathing involves the diaphragm muscle and lungs, while digestion is handled by the digestive system organs.

The ovary is the part of the flower that contains ovules and is essential for seed production and reproduction.

Roots are the external parts of a plant that anchor it into the soil and absorb water and nutrients.

A peacock spreads its feathers primarily to attract a mate, which is a behavior related to reproduction.

Bones provide structural support for the body, protecting internal organs and giving the body its shape. The nervous system transmits signals, the liver filters blood, and lungs handle respiration, but bones are the primary structural framework.

Thorns are sharp, external modifications of plant stems that serve as a defense mechanism to protect the plant from herbivores.

Claws, fur, and scales are physical features located on the outside of an animal's body. These are classified as external structures, which help organisms interact with their environment.