Lymphatic System

Question 1

Function of lymphatic system (4)

Answer 1

Remove excess fluids from body tissues

Absorbs fatty acids from intestines

Transports chyle and fat soluble vitamins via the lacteala in the intessinal villi to the bloodstream

Production of immune cells (lymphocytes) which aid in immune response and removal of pathogens.

Question 2

Components of lymphatic system (5)

Answer 2

Lymphatic capillaries

Lymphatic vessels

Lymphatic ducts

Lymphatic nodes

Lymphatic tissues

Question 3

Function of lymphatic capillaries (2)

Answer 3

They form networks within tissues gathering fluid by osmosis. In the intestinal villi.

The capillaries are known as lacteals and gather up digested fats and attached products

Question 4

How do substances move through lymphatic vessels

Answer 4

Passive movement from the surrounding muscles moves substances through vessels, backflow is prevented with the presence of valves.

Question 5

Thoracic duct Transports substances (2)

Answer 5

Substances are collects in this duct from almost all of the body.

Drained until the jugular vein or cranial vena cava (near heart)

Question 6

The right lymphatic duct

Answer 6

Drains fluid from head, neck, thorax and right forelimb

Drains into right jugular vein or cranial vena cava

Question 7

Tracheal ducts

Answer 7

Drains from the head and neck into the thoracic ducts or one of the main vessels near the heart.

Question 8

Vessels which deliver to lymph nodes are known as afferent vessels

Answer 8

Vessels which leave lymph nodes are known as efferent vessels

Question 9

Lymph node function (2)

Answer 9

Remove particles/pathogens

Produces lymphocytes

Question 10

Describe location of submandibular node

Answer 10

Below the mandibles

Question 11

Describe location of the parotid node

Answer 11

Below the ears, behind temporomandibular joint

Question 12

Prescapular node

Answer 12

In front of scapulae (shoulders)

Question 13

Axillary node

Answer 13

In the axillae (armpits)

Question 14

Popliteal node

Answer 14

Just behind stifle joint (knee)

Question 15

Superficial inguinal node

Answer 15

In the groin

Question 16

Lymphatic organs / tissues

Answer 16

Spleen,
Thymus,
Tonsils
Peyers Patch

Question 17

Describe location (1) and function (3) of spleen

Answer 17

Spleen is closely attached to the greater curvature of the stomach and lies within the omentum.

Functions:

Reservoir for red blood cells and platelets

Removes worn out cells and recovers leftover iron from destroyed blood cells.

Filter out foreign particles and bacteria from circulation

Produce lympocytes

Question 18

Location and function of tonsils

Answer 18

L - TONSILS FORMA RING AT THE JUNCTION OF THE PHARYNX AND ORAL CAVITY

F - THE TONSILS ACT AS A FIRST LINE OF DEFENCE AGAINST MICRO-ORGANISMS WHICH ENTER THE ORAL CAVITY.

Question 19

Location and function of thymus

Answer 19

L- thymus is found in thoracic inlet until adulthood where it most often disappears.

F - the thymus us responsible for producing T-lympocytes