The Lymphatic System

Question 1

what is the lymphatic system

Answer 1

it’s a one way system of vessels that return excess tissue fluid to the blood.
the liquid in the vessels is called lymph

Question 2

lymph nodes where

Answer 2

tonsils
thyroid gland
spleen
lymph nodes

Question 3

formation of lymph

Answer 3

1. fluid called tissue fluid surrounds all cells of the body
2. tissue fluid acts as an exchange medium for the cells
3. tissue fluid is continuously being formed as fluid is forced out or blood plasma in capillaries as the arteriole side.
4. to prevent swelling, the excess fluid must return to the blood.
5. excess tissue fluid drains into lymph vessels and is now called lymph

Question 4

lymph is made up of

Answer 4

tissue fluid
white blood cells
proteins
fats

Question 5

tissue fluid is made of

Answer 5

plasma
water
protein
gases
ions
glucose

Question 6

movement of lymph
lymph is slowly moved through vessels by:

Answer 6

1. Muscular walls of the vessels
2. General body movements pressing on the vessels

Question 7

Role of valves

Answer 7

valves ensure that lymph can only flow in one direction

Question 8

where is lymph emptied back into the blood

Answer 8

its emptied back into blood at the SUBCLAVIAN VEINS in the NECK

Question 9

lymph nodes definition

Answer 9

lymph nodes are dwellings found along lymph vessels
found in clusters in areas such as tonsils , neck, groin, spleen etc

Question 10

what do lymph nodes do?

Answer 10

mature and store large numbers of lymphocytes (WBC)
filter bacteria
use lymphocytes to kill pathogens

Question 11

Functions of lymph

Answer 11

1. to collect excess tissue fluid and return it to the blood
2. to defend the body against infection by: (on other flashcard)
3. to absorb and transport fats in the digestive system
4. to help with hearing and balance inner ear

Question 12

how does it defend the body against infection ????

Answer 12

filtering out micro organisms in lymph nodes
maturing and storing lymphocytes
destroying micro organisms