Human Heart and Circulatory System

Why do your heart and lungs work harder when your body is working hard?

• To make you tired.

• To get more oxygen through your body.

• To make your heart beat faster.

• To help you breathe slower.

What carries blood to the heart?

• Arteries

• Veins

• Lungs

• Muscles

What carries blood away from the heart?

• Veins

• Capillaries

• Arteries

• Nerves

Where is blood needed in your body?

• Only in your heart.

• Only in your brain.

• Only in your toes.

• Everywhere, from head to toes.

What are arteries and veins called together?

• Blood pathways

• Blood vessels

• Blood tubes

• Blood lines

What do the tiny cells in your body need?

• Sugar

• Water

• Oxygen

• Food

What is the job of blood in your body?

• To make you feel warm.

• To deliver oxygen to every part of your body.

• To make your heart beat.

• To help you move.

What brings oxygen into your body when you breathe?

• The heart

• The stomach

• The lungs

• The brain

What does the heart pump blood to first to pick up oxygen?

• The brain

• The lungs

• The stomach

• The legs

What does blood pick up after delivering oxygen to the body?

• More oxygen

• Carbon dioxide

• Food

• Water