The Lymphatic System A. 1.

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Lesson Outline
LESSON 4
The Lymphatic System
A. Functions of the Lymphatic System
1. The
is part of the immune system, and it helps destroy
microorganisms that enter the body.
2. There are
main functions of the lymphatic system.
a. It absorbs some of the tissue
that collects around
cells.
b. It absorbs
from the digestive system and transports
them to the circulatory system.
c. It filters dead cells, viruses, bacteria, and other unneeded particles from tissue
fluid and then returns the tissue fluid to the
.
d. It helps fight off illness and infections and includes structures in which
blood cells develop.
B. Parts of the Lymphatic System
1. The lymphatic system includes lymph
and the fluid
they carry.
.
3. Lymph vessels absorb and
lymph.
4. Lymph vessels include clusters of small, spongy structures called
that filter particles from lymph.
5. When you have a(n)
, production of white blood cells
that fight it increases. Many of these white blood cells gather in the lymph nodes
and cause the nodes to
6.
.
is the spongy center of bones where red and white
blood cells, including lymphocytes, form. T cells and B cells
are
.
7. The
is the organ of the lymphatic system in which
T cells complete their development.
8. The
is an organ of the lymphatic system that recycles
worn-out red blood cells and produces and stores lymphocytes.
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Respiration and Circulation
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
2. Tissue fluid absorbed by the lymph vessels is called
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Lesson Outline continued
9.
are clusters of lymph tissue on the sides of the throat.
They help protect the body from infection by trapping and destroying bacteria and
other
.
C. Lymph Diseases and Disorders
1.
is an inflammation of the tonsils that occurs when the
cells of tonsils become infected.
2. The uncontrolled production of white blood cells is a type of cancer
called
.
D. The Lymphatic System and Homeostasis
1. The lymphatic system helps maintain homeostasis by regulating
buildup around cells.
.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
2. The lymphatic system also removes wastes and fights
Respiration and Circulation
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