Where we are so far…. Know the structure and function of the cardiovascular system:
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Know the structure and function of the cardiovascular system:
The other key function of the CV system….
On the other hand…
When we are cold, the blood vessels direct the blood away from the surface of the body, to keep our core temperature stable.
- This is why we appear more pale/blue when cold
If the body gets too hot, capillaries near the surface of the skin widen. Blood is diverted to the skin where the heat can easily radiate away. This is called vasodilation.
Water from the blood is excreted as sweat to cool the body.
Thermoregulation explained further…