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.

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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.