Chapter 3: Organs Of The Lymphatic System

Question 1

What are Lymph nodes (1)?

Answer 1

Are small structures that work as filters.

Question 2

What does Lymph nodes contain?

Answer 2

Contain specialized white blood cells (lymphocytes and macrophages) that destroy harmful substances in the lymph before it returns to the bloodstream.

Question 3

How many Lymph nodes does the human body has?

Answer 3

There are hundreds of Lymph nodes throughout the body.

Question 4

Where does Lymph nodes are clustered?

Answer 4

In areas where the lymphatic vessels branch off-the groin (inguinal nodes), the armpits (axillary nodes), and the neck (cervical nodes)

Question 5

What are Tonsils?

Answer 5

Tonsils are clusters of the lymphatic tissue just under the mucous membranes that line the nose, mouth and throat.

Question 6

What does Lymphocytes and Macrophages provide in the Tonsils?

Answer 6

They provide protection against harmful substances that may enter the body through the nose and mouth.

Question 7

What is the largest Lymphatic organ in the body?

Answer 7

The Spleen

Question 8

What is the function of the Spleen?

Answer 8

Spleen filters foreign substances from the blood in much the same ways as lymph nodes filter lymph.

Question 9

What is the function of the Thymus Gland?

Answer 9

The primary function of the Thymus Gland is the development of T-lymphocytes or T cells, an extremely important type of white blood cell.

Question 10

What happens after T cells have matured?

Answer 10

They enter the bloodstream and go to the other lymphatic organs where they defend the body from potentially deadly pathogens like bacteria, viruses and fungi.

Question 11

What happens after the Lymphatic system drains interstitial fluid from the tissue spaces?

Answer 11

It returns it to the Venous Circulatory System through lymph capillaries.

Question 12

Where does the lymph capillaries begin as blind end tubes are located?

Answer 12

They are located next to cells and blood capillaries.

Question 13

Once the Interstitial Fluid enter the lymph capillaries it is called?

Answer 13

Lymph.

Question 14

Why does Lymphatic vessels unite?

Answer 14

To form Lymphatic trunks.

Question 15

Where does Lymphatic trunks empty?

Answer 15

Into the thoracic duct and right lymphatic duct, which then empty into the right and left subclavian veins.

Question 16

Why does Lymph nodes produce Lymphocytes?

Answer 16

To help develop immunity to disease.

Question 17

What stimulates the Immune response and Macrophage activity?

Answer 17

Any foreign substance that enters the Lymph node.

Question 18

How is the Circulation of Lymph maintained?

Answer 18

By normal skeletal muscle activity such as movement, breathing and smooth muscle contraction.

Question 19

What does Tonsils do?

Answer 19

Filter microorganisms form the nose and oral cavity.

Question 20

What does Spleen do?

Answer 20

Filters blood via splenic artery and vein, phagocytizes bacteria, worn-out platelets and red blood cells. Releases hemoglobin to be recycled, produces lymphocytes and plasma cells, stores blood and acts as a blood reservoir.

Question 21

What does Thymus help develop?

Answer 21

T-lymphocytes.

Question 22

What is the function of Payer’s patch’s macrophages?

Answer 22

Prevent bacteria from infecting the intestines.

Question 23

What are Lymph nodes (2)?

Answer 23

Small bean-shaped structures located in the lymph vessels.

Question 24

What happens when lymph passes through the nodes?

Answer 24

Harmful substances are removed by the cells of the immune system that are housed here.

Question 25

Swollen lymph nodes are often an indicator of what?

Answer 25

Of a desease being present in the body.