Chapter 18, Problem 4AYKB

Summary Introduction

To review:

The reason that the skin and lips of people with pale skin may “turn blue” in very cold weather.

Introduction:

Hemoglobin (Hb) is an oxygen-binding protein that gives skin an apparent color. Our body has to maintain its temperature and, in this attempt, it constricts or dilates blood vessels that increases or decreases the blood supply to tissues.