Across
- 1. tubes that carry liquids such as blood through the body
- 4. a measure of the pressure at which the blood flows through the body
- 7. the period in the day when light from the sun begins to appear in the sky:
- 10. a hormone in the body that is involved in controlling biorhythms such as our sleep pattern
Down
- 2. a small, brown bird that is known for its early rise
- 3. any of various chemicals that influence the body’s growth and how it works
- 5. to change food in your stomach into substances
- 6. to experience difficulty and make a very great effort in order to do something
- 8. quick to see, understand, and act in a particular situation
- 9. to send out light, sound, or a smell, or a gas