Lymphatic System

Question 1

a fluid containing infection fighting white blood cells, throughout the body

Answer 1

lymph

Question 2

constitute a one-way pathway that parallels the venous system and eventually empties into the cranial vena cava or some of its tributaries

Major Structures

Answer 2

Lymphatic vessels

Question 3

are discrete knots (small bean-shaped structures) of lymphoid tissue scattered along the course of lymph vessels. It filter the lymph and act as one of the first defenses against infection by harboring lymphocytes. plasma cells, and macrophages.

Major Structures

Answer 3

Lymph nodes

Question 4

is an organ of immature animals, undergoing involution at puberty, although never completely disappearing, lies cranial to the heart, with portions extending along the trachea craniad into the ventral neck.

Major Structures

Answer 4

Thymus

Question 5

• is a lymphoid organ associated with the circulatory system.
• Functions: blood reservoir, graveyard for old RBCs, blood forming organ in young animals, lymphatic organ.

Major Structures

Answer 5

Spleen

Question 6

found only in birds, round sac located just above the cloaca, reaches its greatest size in the chick about 1 to 2 weeks after hatching and then shirks as the bird ages

Major Structures

Answer 6

Bursa of Fabricius

Question 7

lymphoid organs located in the walls of the small intestine; MALT

Major Structures

Answer 7

Peyer’s Patches

Question 8

is an inencapsulated aggregate of lymphatic nodules associated with the pharyngeal mucosa.

Major Structures

Answer 8

Tonsil

Question 9

appears as a raised homogeneous band at the antimesenteric side of the mucosa

Major Structures

Answer 9

Peyer’s patches in Ruminants