The Lymphatic System

Question 1

Functions of the lymphatic system

Answer 1

production, maintenance, and distribution of lymphocytes; returns excess fluid from the tissues to large veins near the heart; transports lipids from the digestive system to large veins near the heart

Question 2

Lymphatic vessels all converge to form to large vessels

Answer 2

Right lymphatic duct – delivers lymph fluid from the upper right side of the body; and the thoracic duct – delivers fluid from the rest of the body; both empty into the subclavian veins

Question 3

Characteristics of lymphatic organs and tissues

Answer 3

relatively soft tissues; have fibrous capsules; have lots of reticular tissue within; contain many lymphocytes

Question 4

Lymph nodes

Answer 4

Small, oval shaped structures that can be anywhere from 1 to 25 mm long; lymph fluid will pass through the nodes as they progress through the vessel system

Question 5

Function of lymph nodes:

Answer 5

to filter the lymph as it passes; filters bacteria, dead cells, and cell debris from the lymph; will attack any potential pathogens

Question 6

Thymus

Answer 6

bi-lobed organ located just behind the sternum above the heart; produces lymphocytes

Question 7

Spleen

Answer 7

located on the left side of the abdomen; very highly vascularized

Question 8

Functions of the spleen

Answer 8

filters foreign substances from the blood; recycles worn out red blood cells and stores iron; serves as a reservoir for spare red blood cells; supports a large population of lymphocytes

Question 9

Tonsils

Answer 9

located in the throat region, along the walls of the pharynx; first line of defense against ingested pathogens; contain a large concentration of lymphocytes