Human Body Systems

Which system breaks down food?

• digestive

• circulatory

• respiratory

• immune

Answer explanation

The digestive system breaks down food.

The endocrine system is responsible for

• breathing

• hormones

• blood circulation

• nerves

Answer explanation

The endocrine system is responsible for hormones, including those that make babies.

The heart pumps blood through this system.

• respiratory

• endocrine

• immune

• circulatory

Answer explanation

The heart pumps blood through the circulatory system.

The kidneys are part of this system.

• respiratory

• excretory

• circulatory

• digestive

Answer explanation

The kidneys are part of the excretory system.

Which system senses pain and sends signals to the brain and spinal cord?

• immune

• excretory

• nervous

• circulatory

Answer explanation

The nervous system senses pain and sends signals to the brain and spinal cord.

Write one fact about the respiratory system.

When you get sick, which system protects the body through white blood cells (T cells)?

• endocrine

• immune

• nervous

• respiratory

The bladder stores this.

• nerves

• urine

• hormones

• food

Answer explanation

The bladder stores urine.

Draw a Neuron

Which system provides oxygen to the organs?

• digestive

• circulatory

• respiratory

• excretory

Answer explanation

The circulatory system provides oxygen to the body.