Human Anatomy (9th Edition)
9th Edition
ISBN: 9780134320762
Author: Frederic H. Martini, Robert B. Tallitsch, Judi L. Nath
Publisher: PEARSON
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Chapter 23, Problem 13RFT
Summary Introduction
Introduction:
Lymphoid capillaries carry lymph instead of blood in them. They are very different from the blood capillaries. The lymphoid capillary is more porous than the blood capillary. They consist of thinner walls and large diameter of lumen. Their outline is also irregular and they have anchoring filaments that are made of collagen.
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(a)
The lymphatic system is a part of the circulatory system and a vital part of the immune
system. It is a network of tubes throughout the body that drains fluid (called lymph)
from tissues and empties it back into the bloodstream.
(i)
Give a brief explanation why the lymphatic system is a one-way system,
whereas the blood vascular system is a two-way system.
(ii)
Point out TWO (2) type of infections that may cause the lymph nodes to swell.
(a) Which anatomical characteristic ensures that the flow of lymph through a lymph node is slow? (b) Why is this desirable?
Lymphatic capillaries (a) are open-ended like drinking straws, (b) have continuous tight junctions like those of the capillaries of the blood brain barrier, (c) have endothelial cells separated by flaplike minivalves that open wide, (d) have special barriers that stop cancer cells from entering, (e) all of the above.
Chapter 23 Solutions
Human Anatomy (9th Edition)
Ch. 23 - Match each numbered item with the most closely...Ch. 23 - Match each numbered item with the most closely...Ch. 23 - Prob. 3RFTCh. 23 - Prob. 4RFTCh. 23 - Prob. 5RFTCh. 23 - Prob. 6RFTCh. 23 - Prob. 7RFTCh. 23 - Match each numbered item with the most closely...Ch. 23 - Prob. 9RFTCh. 23 - Prob. 10RFT
Ch. 23 - Identify the structures of the lymphatic system in...Ch. 23 - The lymphatic system is composed of (a) lymphatic...Ch. 23 - Prob. 13RFTCh. 23 - 14. Most of the lymph returns to the venous...Ch. 23 - Prob. 15RFTCh. 23 - Prob. 16RFTCh. 23 - Prob. 17RFTCh. 23 - Prob. 18RFTCh. 23 - Prob. 19RFTCh. 23 - Prob. 20RFTCh. 23 - Prob. 21RFTCh. 23 - Prob. 1RCCh. 23 - Prob. 2RCCh. 23 - Blocking the antigen receptors on the surface of...Ch. 23 - Prob. 4RCCh. 23 - 5. What major artery and vein pass through the...Ch. 23 - Prob. 6RCCh. 23 - Prob. 7RCCh. 23 - Prob. 8RCCh. 23 - 9. What occurs in secondary lymphatic structures?
Ch. 23 - 10. Where are aggregated lymphoid nodules, also...Ch. 23 - Prob. 1CTCh. 23 - Prob. 2CTCh. 23 - Prob. 3CT
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- The germinal centers in lymph nodes are sites of (a) the lymph sinuses, (b) proliferating B lymphocytes, (c) T lymphocytes, (d) a and c, (e) all of the above.arrow_forwardLymph collected from the lower abdomen, pelvis, and lower limbs is carried by the: (a) right lymphatic duct. (b) inguinal duct. (c) thoracic duct. (d) aorta.arrow_forwardWhich part of the body does the thoracic duct not drain lymph from? (a) the left side of the neck, (b) both the lower limbs, (c) both the upper limbs, (d) the left half of the head.arrow_forward
- Red blood cells that are damaged or defective are removed from the circulation by the (a) thymus. (b) lymph nodes. (c) spleen. (d) tonsils.arrow_forwardAsap Lymph enters a lymph node via afferent vessels, circulates through lymph sinuses, and then exits via efferent vessels. What is the physiological significance of each lymph node having fewer efferent vessels than afferent vessels?arrow_forward(a)Define formed elements and list their three major categories. (b) Which is least numerous?(c ) Which comprise(s) the buffy coat in a hematocrit tube?arrow_forward
- What are the functions of the (a) lymphocytes, (b) basophils, (c) monocytes, (d) eosinophils, and (e) neutrophils?arrow_forwardDirectly after fluid leaks out a vessel into the surrounding tissue (due to ______ blood pressure) it gets a name change from plasma to ______ fill in the blank (A) low, interstitial fluid (B) high, lymph (C) high, interstitial fluid (D) low, lympharrow_forwardThe first step in the process of hemostasis is, (a) coagulation. (b) the platelet phase. (c) fibrinolysis. (d) vascular spasm.arrow_forward
- Lymphatic capillaries function to transport all of the following EXCEPT Choose from the following: (A) extracellular fluid (B) lipids (C) erythrocytes (D) leukocytes (E) invading micro-organismsarrow_forwardPhagocytes move through capillary walls by squeezing between adjacent endothelial cells, a process known as (a) emigration. (b) chemotaxis. (c) adhesion. (d) perforation.arrow_forwardThe basic structural framework of most lymphoid organs consists of (a) areolar connective tissue, (b) hematopoietic tissue, (c) reticular connective tissue, (d) adipose tissue.arrow_forward
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