Ima

Definition:

The skeletal system is the framework of bones in our body. It gives our body shape, support, and protection.

Main Parts of the Skeleton:

1. Skull – Protects the brain

2. Spine (Backbone) – Helps us stand straight and bend

3. Rib Cage – Protects the heart and lungs

Definition:

A human organ system is a group of organs that work together to do a special job in our body.

Main Points:

1. Our body has many organ systems.

2. Each organ system has a different function.

3. The digestive system digests food.

Definition:

Earth is the planet we live on. It is our home in space.

Main points :

• Earth is the third planet from the Sun 

• It has air, water, and land, which support life

• Earth has one Moon 

Main Human Organ Systems

1. Digestive system – Digests food and gives energy.

2. Respiratory system – Helps us breathe.

3. Circulatory system – Carries blood, oxygen, and nutrients.

4. Nervous system – Controls thinking and body actions.

5. Skeletal system – Gives shape and support to the body.