Across
- 2. A process that involves the widening of blood vessels at the skin surface to increase heat loss through the surface of the skin.
- 4. One-cell-thick blood vessels that undergo gas exchange.
- 6. A wall that divides the heart into two halves.
- 8. One of the two chambers at the bottom of the heart.
Down
- 1. A process that involves the narrowing of blood vessels at the skin surface to reduce heat loss through the surface of the skin.
- 3. One of the two chambers at the top of the heart.
- 5. Thick wall blood vessel that carries blood under high pressure.
- 7. Thin wall blood vessel that carries blood under low pressure.