BIOLOGY
BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 47.2, Problem 2LO
Summary Introduction

To explain: The advantage of countercurrent flow.

Introduction: Gas exchange is the physical process by which gases move passively by the diffusion across a surface. Gases are constantly produced and consumed by metabolic and cellular reactions in most living things. Most larger organism have a small surface area to volume ratios and the specialized structures such as pulmonary alveoli, gills, and spongy mesophyll gives the larger area needed for the effective exchange of gas.

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