LABORATORY MANUAL FOR HUMAN ANATOMY & PH
LABORATORY MANUAL FOR HUMAN ANATOMY & PH
4th Edition
ISBN: 9781260254426
Author: Martin
Publisher: MCG
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Textbook Question
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Chapter 49, Problem 1PL

Lymph finally flows into lymphatic _______ just before connecting to a blood vessel.
a. capillaries
b. collecting ducts
c. vessels
d. trunks

Expert Solution & Answer
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Summary Introduction

Introduction :

The lymphatic system is a network of organs and tissues that helps rid the body of toxins, waste and other unwanted substances. It is composed of a large group of lymphatic organs, lymphatic or lymphoid tissues, and lymphoid vessels.The major function of the lymphatic system is to carry a fluid containing infection-fighting white blood cells (lymph) all over the body. The additional main function is protection in the immune system.

Answer to Problem 1PL

Correct answer :

The correct answer is option (b) collecting ducts.

Explanation of Solution

Explanation/justification for the correct answer :

Option (b) collecting ducts. A lymphatic duct is a large lymph vessel that releases the lymph into one of the sub clavian veins. There are 2 lymph tubes in the body - right lymphatic duct and thoracic duct. The right lymphatic duct empties from the right upper limb into the lymph, to the right side of the head and neck and the right side of the thoracic. So, this is the correct option.

Explanation for incorrect answer :

Option (a) capillaries. A little blood vessel is called a capillary. They are the smallest blood vessels in the body. They carry blood between arteries and veins. So, this is an incorrect option.

Option (c) vessels. The lymphatic vessel is a thin-walled, streamlined structure that carries the lymph. The blood vessel is a section of the circulatory system and functions to transport blood throughout the body. So, this is an incorrect option.

Option (d) trunks. Apart from the head and limbs, a person's body is called a trunk. Without hands, the part below the neck and above the waist can be considered as a trunk. So, this is an incorrect option.

Conclusion

Lymph finally runs into lymphatic collecting ducts just before connecting to a blood vessel. Hence, the correct answer is option (b) collecting ducts.

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Students have asked these similar questions
Lymph is drained into the thoracic duct from which of the following body regions? a. right lower limb b. right upper limb c. right side of the head d. right side of the thorax
Which of the following is not true of the lymphatic system? Oxygen is transported to body tissues a. b. Slow muscular contractions cause the fluid to move in the vessels The lymph is returned to the veins C. d. There are flap-like valves to prevent the backflow of fluid O O O O
Explain why each choice (a-d) is correct or incorrect The lymphatic capillaries are a. More permeable than blood capillaries b. Less permeable than blood capillaries c. As permeable as blood capillaries d. Completely impermeable

Chapter 49 Solutions

LABORATORY MANUAL FOR HUMAN ANATOMY & PH

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