Describe how blood vessels help to control body temperature?

In hot environments, blood vessels under the surface of the skin dilate to allow more blood to flow through them. This causes more heat to be lost from the blood to the environment so body temperature decreases to a normal level.
In cold environments, the opposite occurs and the blood vessels under the surface of the skin constrict. This makes it harder for blood to flow through them and less heat is lost from the blood to the environment. Body temperature is able to increase back to a normal level.

Answered by Annabel C. Biology tutor

2784 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What is the difference between breathing and respiration?


What are the differences between plant and animal cells?


Cystic fibrosis is a genetic disorder caused by recessive alleles. Complete a Punnet square to show the inheritance of cystic fibrosis when both parents are carriers. State the probability of that a child born to these parents will have cystic fibrosis.


What is the difference between a virus and a bacteria? What is an example of each?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences