LabLymphoid

Question 1

lymphocyte

Answer 1

inactivated, the darkest

Question 2

lymphoblast

Answer 2

activated, immature, basophilic, enlarged nuclei

Question 3

medium sized lymphocyte

Answer 3

arise from lymphoblast
nuclei lighter than lymphocyte
darker than lymphoblast

Question 4

solitary lymph nodule

Answer 4

germinal center - light lymphocyte (immature)
Mantle - dark outer layer cells, smaller/darker lymphocytes
lighter outer marginal layer
two types:
Primary - no germinal
secondary - germinal

Question 5

Lymph node

Answer 5

capsule, cortex, central medulla, hilim

Question 6

Lymph node: cortexo

Answer 6

Outer - nodules (B) with reaction center (medium)
surrounded by mantle (small)
Inner - deep cortex (T)
Non nodular lymph
lies between and deep to nodules
extends into central medulla as narrow cords (WITH B CELLS)

Question 7

Lymph node: Central Medulla

Answer 7

Inner cortex cords (dense lymphatic tissue)

cords are separated by medullary sinuses (loose lymphatic tissue)

Question 8

Lymph node: Reticular Fibers

Answer 8

Dont stain with H/E, only with silver
Black thin branches
Seen in capsule, surrounding blood vessels

Question 9

Lymph node: Reticular Cells

Answer 9

In sinuses
Don’t stain well
Arms of cytoplasm/stellate
LOOKS LIKE NEURON

Question 10

Lymph node: Afferent lymphatic

Answer 10

Seen within outer capsule
Looks like large, irregularly shaped blob filled with white
Valves, nodules within
Delivers LYMPH FLUID

Question 11

Lymph node: Efferent lymphatic

Answer 11

Located in Hilis

Afferent is in outer capsule

Question 12

Lymph node: Macrophage

Answer 12

in sinuses
Large, acidophilic, contain debris
Mushy, pink circle

Question 13

Lymph node: Venules

Answer 13

Deep cortex

Lined by TALL endothelium

Question 14

Lymph node: Arterioles

Answer 14

In dense tissue of medulla and cortex

Question 15

Lymph node: blood vessels

Answer 15

Blood vessels are at dense lymphatic tissue of cortex/medulla

Question 16

Lymph node: Capsule

Answer 16

dense CT
subcapsular sinus
Trabeculae which extend into the organ from capsule
(surrounded by trabecular sinuses)

Question 17

Spleen

Answer 17

Capsule
White pulp
Red pulp
Nodules
Trabeculae
Septae

Question 18

Spleen: Capsule

Answer 18

CT

Septae penetrate from capsule

Question 19

Spleen: White Pulp

Answer 19

looks like a bunch of nodules with in red pulp sea
Nodules
PALS - sheath of helper T encircling central artery

Question 20

Spleen: Red pulp

Answer 20

Not red/darker depending on the stain used
anything that is not nodules
2 parts - parenchyma, splenic sinuses

Question 21

Spleen: Nodules

Answer 21

Marginal layer - periphery (lighter than mantle)
Mantle - small dark
Germinal center
Central artery -encircled by PALS (T helper), enters red pulp from white pulp as penicillar artery.

Question 22

Spleen: Trabeculae

Answer 22

Trabecular artery - thick wall

Trabecular vein - thin wall

Question 23

Thymus

Answer 23

Capsule
Cortex
Medulla - Hassel’s Corpuscles
Septae

Question 24

Thymus: Hassel’s Corpuscle

Answer 24

in Medulla
round, eosinophilic
Epithelial reticular cells that are cornified

Question 25

Tonsils

Answer 25

Nodules below an endothelium Palantine tonsil Lingual Tonsil

Question 26

Palantine tonsil

Answer 26

border between pharynx and oral cavity covered by stratified squamous epithelium Crypts - lined by epithelium, overlie the aggregates of lymph nodules

Question 27

Lingual Tonsil

Answer 27

under stratified squamous epithelium in posterior tongue Crypt Mucous glands and muscles lie below the tonsil