The circulatory system
Heart, blood and blood vessels.
A delivery system
Oxygen and nutrients must reach every part of the body, even your toes.
What carries them there?
What this lesson covers
The idea
The circulatory system, made of the heart, blood and blood vessels, transports substances: the heart pumps blood through blood vessels, carrying nutrients and oxygen to all parts of the body and carrying waste products away.
A delivery system
Oxygen and nutrients must reach every part of the body, even your toes.
What carries them there?
- Blood pumped by the heart
- Air in the stomach
- The food pipe
Pump
Press Pump three times. Watch the dots.
Out and back
Oxygen and nutrients went out to all parts of the body. Waste was carried back. (The loop in the picture is a simple drawing.)
The circulatory system, made of the heart, blood and blood vessels, transports substances. The heart pumps blood through blood vessels, carrying nutrients and oxygen to all parts of the body and carrying waste products away.
Notes
The circulatory system, made of the heart, blood and blood vessels, transports substances. The heart pumps blood through blood vessels, carrying nutrients and oxygen to all parts of the body and carrying waste products away.
Check yourself
Which three make up the circulatory system?
What does the heart do?
What does the blood carry to all parts of the body?
What does the blood carry away from the body parts?
- Teeth, tongue and saliva. These work in the mouth during digestion. The circulatory system has the heart, blood and blood vessels.
- Heart, blood and blood vessels — correct. Yes!
- Nose, windpipe and lungs. These are parts of the path of air in the respiratory system.
- Makes bile. Bile is made by the liver. The heart pumps blood.
- Churns food. The stomach churns food. The heart pumps blood.
- Pumps blood through the blood vessels — correct. Yes!
- Nutrients and oxygen — correct. Yes!
- Only waste. Blood does carry waste away, but it also carries nutrients and oxygen to all parts.
- Only air from outside. Air goes to the lungs. Blood carries nutrients and oxygen to all parts.
- Oxygen. Blood brings oxygen to the body parts.
- Waste products — correct. Yes!
- Nutrients. Blood brings nutrients to the body parts.