Across
- 4. The words used to describe blood that contains high levels of oxygen.
- 5. A type of blood vessel that carries blood back into the heart.
- 7. An important organ in the body which is made up of muscle.
- 8. There are 4 of these in the heart.
- 10. This fluid is crucial to our survival as it transports useful substances like oxygen around the body.
- 11. This body system is made up of the skeleton. It provides support to our body.
Down
- 1. The word used to describe the number of heartbeats per minute.
- 2. An instrument used a lot by doctors to listen to a patient's heartbeat.
- 3. Prevents blood from flowing the wrong way. These can be found in the heart and in the veins.
- 6. This body system is made up of the brain, nerves and spinal cord. It controls all actions in the body.
- 9. This structure protects the heart and the lungs.