Lymphatic System

Question 1

What is lymph?

Answer 1

Similar to plasma but without larger plasma protiens, formed from fluid leaked from capillaries

Question 2

Lymphatic Capillaries

Answer 2

Excess fluid is collected the interstitial space by small lymphatic vessels

Question 3

Lymphatic Vessels

Answer 3

-Lymphatic capillaries then form larger vessels that have a similar structure to veins
-They gave small valves
-Lymph flow is passive

Question 4

Lymphatic Nodes

Answer 4

-Nodules of lymph tissue
-Lymph nodes mature lymphocytes

Question 5

Lymphatic Ducts

Answer 5

• Lymphatic vessels then enter a larger lymphatic duct
  Right lymphatic duct - drains lymph from the right side of the head, neck, thorax snd right forelimb
  Tracheal Ducts- drain lymph from the left side of the head and neck
  Thoracic Duct- collects lymph from rest of body

Question 6

Lymphatic Tissue

Answer 6

Includes larger tissues known as:
-Spleen
-Thymus
-Tonsils

Question 7

Spleen

Answer 7

-Stores new blood cells erythrocytes
-Destroys worn out red blood cells

Question 8

Thymus

Answer 8

-Important in young animals
-Located in cranial thorax

Question 9

Tonsils

Answer 9

-First line of defence against microoganisms that enter the mouth physical barrier

Question 10

The immune system

Answer 10

The body has 3 layers of immunity:
Physical barriers-Integument, tear production etc
Innate immunity- Immediate WBC response
Acquired Immunity- antibodies + cell mediated immune response

Question 11

Innate WBCS

Answer 11

-Neutrophils
-Monocytes
-Eosinophils
-Basophils

Question 12

B lymphocytes

Answer 12

-Produce antibodies
-Produced by stem cells in bone marrow and matured there