Lec 21

Question 1

what start as blind-ending, thin-walled capillaries in the connective tissue
are more permeable than blood capillaries and pick up excess interstitial fluid
They are similar to veins, but have thinner walls, no basement membrane, more valves and have lymph nodes along their course.
are not present in the brain, spinal cord or bone marrow.

Answer 1

Lymph vessels

Question 2

what is the same as that of interstitial fluid and plasma. It is a clear, slightly yellowish and opalescent fluid

Answer 2

Lymph

Question 3

what are in the intestines and milky from the absorbed fat

Answer 3

Chyle

Question 4

Of the lymphoid tissue which one is unorganized collection of lymphocytes

Answer 4

diffuse

Question 5

Of the lymphoid tissue which one is always surrounded by diffuse tissue
more organized
germinal center

Answer 5

Nodular

Question 6

what path does lymph node take from afferent to efferent lymph vessels?

Answer 6

in from afferent lymphatic vessle to
subcapsular sinus drains to the trabecular sinuses.
traveculae sinus drain into medullary sinus
medullary sinus out the efferent lymph vessels

Question 7

what are germinal centers and what organs are they in?

Answer 7

• Nodular lymphatic tissue
• Clone of B-lymphocytes
• Site of antibody production
present in the spleen

Question 8

what recieves lymph from lumbar and visceral trunks and drains the lymph nodes of the abdomen, pelvis, and pelvic limb?

Answer 8

cisterna chyli

Question 9

where is the spleen located?

Answer 9

upper left region of the abdomen

Question 10

Major lymphatic vessels draining the entire body except right thoracic limb, right crainial thorax and right side of neck.
It empties near thoracic inlet into the jugular vein or caudal vena cava.

Answer 10

thoracic duct

Question 11

Drains right cranial thorax, right thoracic limb and right side of the neck into the venous system where the caudal vena cava is formed.

Answer 11

right lymphatic duct

Question 12

What are the 3 principle cell types in the thymus?

Answer 12

• thymocytes
• macrophages
• epithelio-reticular cells

Question 13

consists most of the spleenic pulp, acts as a filter, many fixed macrophages. mostly red because blood is held within it.
consists most of the spleenic pulp, acts as a filter, many fixed macrophages. mostly red because blood is held within it.

Answer 13

red pulp

Question 14

White areas form nodules and sheaths of lymphocytes around arteries and arterioles (PALS).

Answer 14

white pulp

Question 15

“PALS”, place where special conditions require for proliferation of B-lymphocytes can be met. Its found in the spleen.

Answer 15

Periateriolar lymphocyte sheaths

Question 16

Its a concentric mass of epithelial cells only present in the thymus of mammals

Answer 16

Hassal’s corpuscles

Question 17

Drains the ventral part of the head

Answer 17

mandibular lymph node

Question 18

drains the dorsal part of the head

Answer 18

parotid lymph node

Question 19

drains deeper structures of the head and neck

Answer 19

retropharyngeal lympho center

Question 20

(prescapular)- located in front of shoulder joint, drains superficial neck, dorsal thorax, and proximal forelimb.

Answer 20

superficial cervical lymph node

Question 21

along trachea, drains deep/ventral structures of the neck to the thoracic duct on left side or lymphatic duct on right

Answer 21

deep cervical lymph nodes

Question 22

located in the axilla, drains forelimb and thoracic wall, drains first three mammary glands in dogs

Answer 22

axillary lymph node

Question 23

drains the groin, caudal mammary glands and scrotum into iliosacral or deep inguinal lymph node. is present in all species.

Answer 23

superficial inguinal lymphocytes

Question 24

drains distal limb into medial iliac center. superficial in carnivores deep in other species.

Answer 24

popliteal lymph node

Question 25

located near the termination of the aorta in the abdominal and pelvic cavities. drains the pelvic organs and hind limb into the lumbar trunks.

Answer 25

Medial iliac and sacral lymph nodes