Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 20 - The Lymphatic System and Lymphoid Organs and Tissues - Review Questions - Page 762: 3


A and D

Work Step by Step

Lymphatic capillaries are thin walled vessels made up of endothelial cells. The edges of the endothelial cells are overlapping each other to form flap-like mini valves. The cells are anchored to the nearby structures to prevent the collapse of cells if interstitial fluid pressure increases. So the factors that promote entry of lymph into lymphatic capillaries are one-way mini valves formed by overlapping endothelial cells and greater fluid pressure in the interstitial space.
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