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MICROSCOPIC ANATOMY (Mrs. Lucia Rigos) > Lymphoid & Integumentary System > Flashcards

Lymphoid & Integumentary System Flashcards

1
Q

•Lymphatic +vascular system = hemilymphatic sys which a 2’dry defense

•Produces defensive cells like T lymphocytes, plasma cells, macrophages, etc

•Filters and transport lymph and blood

•Produce IG’s

•Phagocytize foreign bodies

A

LYMPHATIC SYSTEM

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2
Q

Cells located in the l. propria of digestive, respiratory and urogenitals

A

Diffuse and unencapsulated lymphatic tissue

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3
Q

Lymphocytic pop’ns
forming nodules-small, spheroidal or ovoid
aggregates

A

Dense unencapsulated lymphatic tissue

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4
Q

Composed of lymphocytes and
macrophages

A

Primary nodule/follicle

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5
Q

Collections of lympha. tissue in the small intestine

A

Peyer’s patch

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6
Q

Has pale germinal center surrounded by dark staining corona or cortex or
mantle zone of small lymphocytes=
active nodule

A

Secondary nodule

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7
Q

Aggregated lymph nodules in the pharyngeal
mucosa

A

Tonsils

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8
Q

Formed by by a single layer of
lymphatic tisue 2’drly protruding into the lumen
Palatine & Lingual tonsils in M,H,R,S

A

Tonsil with crypt

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9
Q

A group of tonsillar follicles

A

Tonsil without crypt

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10
Q

A blind sometimes branched invagination of the
surface epithelium

A

Crypt

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11
Q

A bean shaped which vary in size fr a mm to sev’rl cm

A

Lymph gland

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12
Q

Form the fine stromal elements

A

Reticular fibers

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13
Q

Divided into outer cortex and inner
medulla

A

Parenchyma

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14
Q

Divided into nodular, internodular and deep zones

A

Occupied by the nodular follicles=primary & secondary

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15
Q

Concentrate on the 1’ry nodules and germinal
centers

A

B cells

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16
Q

Occupy the paracortical zones

A

T cells

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17
Q

Result from the differentiation of B cells in the germinal centers that move into the periphery of
the nodules

A

Plasma cells

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18
Q

Cortical nodular fusion is
common in this animal

A

Horse

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19
Q

Nodules
have large germinal centers in this animal

A

Oxen

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20
Q

Consist of branching reticular fibers and cells surrounded by medullary sinuses and lymph
capillaries=medullary cords

A

Medulla

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21
Q

Stellate cells with fine network of interlacing processes that traps antigen for presentation

A

Dendritic cell

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22
Q

Specifically called interdigitating cell (IDC) and follicular dendritic cell respectively

A

T and B cells

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23
Q

• sinuses are filled with blood not
lymph
• Capsules and trabeculae contain
smooth muscle fibers
• Described as miniature of spleen but look like lymph node
• Occur in ruminants along the vertebral columns and jugular furrow

A

Hemal nodes

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24
Q

•Blood and lymph intermixes in the
sinuses thus called hemorrhagic
lymph node

•Occur in the perirenal (sheep &
goat) and lumbar regions (ox)

A

Hemolymph node

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25
Q

• largest mass of lymphatic tissue

• capsule is dense collagenous that
extends into the parenchyma
dividing it into small compartments

• Smooth muscles and elastic fibers
are present in the capsule and
trabeculae

A

Spleen

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26
Q

Distinct cortex and medulla is absent instead, scattered in the parenchyma – white and red pulp

A
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27
Q

• Contains splenic phagocytic sinuses and cords

• Regions between splenic corpuscles and
trabeculae, called so for its
vascularity

A

Red pulp

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28
Q

Few trabeculae and muscle fibers but
abundant lymphatic tissue ex. Human and marsupials

A

Defensive spleen

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29
Q

Many trabeculae & smooth muscle and less lymphatic tissue-ex.horse, dog & cat

A

Storage spleen

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30
Q

Occur in ruminants and swine

A

Intermediate spleen

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31
Q

•Derived from the 3rd & 4th paryngeal
pouches
•Parenchyma is divided into outer
cortex and deep medulla
•Parenchymal cells are chiefly of the T cells or thymocytes
•Capsule enclosing the organ is
composed of dense collagenous fibers that penetrate the parenchyma , dividing the organ into lobes

A

Thymus

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32
Q

Densely populated of the thymocytes
than the medulla obliterating the cytoreticulum
formed by the epithelio-reticular cells

A

Cortex

33
Q

Organ is distinguished by the Hassal or Thymic corpuscle of various sizes.

A

Medulla

34
Q

Contribute to the blood-thymus barrier

A

Epithelial-reticular cells

35
Q

Movement of thymocytes through
post capillary venules to secondary lymphatic organs
- significant aspect of cell-mediated immunity

A

Peripherlization

36
Q

Hormones of
thymus
- influence the development of progenitor cells into
T-cells

A

Thymosin and thymopoietin I&II

37
Q

•Is a blind sac opening into the dorsal
proctodeal wall of the cloaca
•Parenchymal cells are chiefly of the B
cells
•Dense collagenous capsule penetrate
deeply as septa and dividing the organ into
lobes
•Wall of the organ is columnar or
pseudostratified

A

Bursa of Fabricius

38
Q

Characterized by moderate concentration of scattered lymphocytes.

A

Diffuse unencapsulated lymphatic tissue

39
Q

Round, oval, or irregularly circumscribed aggregation of mostly
small, densely packed lymphocytes

A

Lymphatic nodule

40
Q

Central pale area (with large lymphocytes)

A

Germinal center

41
Q

(Marginal or peripheral zone) – dense of small lymphocytes

A

Corona

42
Q

Collection of lymphatic nodules and diffuse lymphatic tissue.
Present at the connective tissue in a specific region

A

TONSILS

43
Q

Characterized by deep invaginations of the surface epithelium called crypts

A

Tonsil with crypt

44
Q

Smooth, somewhat folded, or bulging surface, but lack deep invaginations of the epithelium.

A

Tonsil without crypt

45
Q

Lymphatic nodules surrounded by
diffuse lymphatic tissue

A

Cortex

46
Q

Connective tissue, with some
smooth muscle and elastic fibers, covers the lymph node

A

Capsule

47
Q

Part of capsule that moves inward

A

Trabeculae

48
Q

Blood-filled sinuses between cellular cords
occur along blood vessels of
ruminants
lack lymphatic vessels

A

Hemal nodes

49
Q

• Has capsule rich in smooth muscle and elastic fiber

• Parenhcyma is divided into red
and white pulp

• White pulp – PALS, lymphatic
nodules

• Red pulp - RBC

A

Spleen

50
Q

Red pulp contains venous sinuses (wide channels lined by elongated,
longitudinally oriented endothelial cells)

A

Sinusal spleen

51
Q

Poorly develop or no sinus

A

Non-sinusal spleen

52
Q

Covered by a thin capsule of connective tissue that
projects inward as septa, partially dividing the organ into lobules

A

Thymus

53
Q

Occur in the medulla of each lobule; concentric whorls of acidophilic and flattened reticular cells

A

Hassal’s corpuscle

54
Q

•Effective barrier between the internal and external environment.
•Temperature regulation
•Secretory function
•Assists in Ca homeostasis thru UV light conversion of 7
dehydrocholecalciferol into cholecalciferol in the sebaceous glands
•Skin pigments protection against UV radiation
•Provides general behavioral pattern, sexual behavioral displays and
mechanical protection
•Skin is an extensive sensory organ

A

Integumentary system

55
Q

Stratified squamous epithelium keratinized

A

Epidermis

56
Q

Single layer of pyramidal,
cuboidal or columnar cells

A

Stratum basale

57
Q

Light staining cells flattened
toward the surface, cells have many cellular
processes presenting spinous appearance

A

Stratum spinosum

58
Q

Spindle-shaped cells
contain keratohyalin granules (thick or absent)

A

Stratum granulosum

59
Q

Layer of pale acidophilic cells of
dead or dying with indistinct nuclei; not a distinct
feature of the epidermis of domestic
animals(when present-digital pad, teat,nose &
periopole)

A

Stratum lucidum

60
Q

Layer of closely packed cells, thickness depends on the location in the body

A

Stratum corneum

61
Q

Follow the contour of
the stratum basale

A

Papillary (superficial)

62
Q

Dense collagenous tissue

A

Reticular (deep)

63
Q

Finger-like projections
extending into the epidermis from the dermis

A

Dermal papillae

64
Q

Complimentary projections
of the epidermis into the dermis

A

Epidermal peg

65
Q

Confluent
epidermal peg

A

Epidermal ridge

66
Q

Layer of loose collagenous tissue

A

Subcutaneus

67
Q

Thick infiltration of adipose tissue (digital pad, equine digital cushion)

A

Panniculus adiposus

68
Q

• Highly cornified, thickened, pigmented and
hairless region
•Thickest epidermis of the carnivores
•Digital cushion /panniculus adiposus
•Merocrine glands occur in the dermis and epidermis

A

Digital pad

69
Q

Thinnest epidermis
•Stratum corneum is not well developed
•Dermis is not extensive

A

Scrotum

70
Q

•Planum nasale (carnivores)- thick & highly cornified devoid of
sebaceous gland

•Planum nasolabiale (ox),planum nasale (small ruminants), planum
rostrale (swine)-contain merocrine glands

A

Nose

71
Q

In growth of the presumptive epidermis and basement membrane into the underlying dermis

A

Hair follicles

72
Q

Formed by the invagination of the epidermis (s. basale & s.spinosum)

A

External root sheath

73
Q

Formed by several layers of flattened cells with or without
trichohyalin granules

A

Internal root sheath

74
Q

Follicles terminate in a hollow, cone-
shaped epidermal peg

A

Hair bulb

75
Q

A smooth muscle, contraction of which erects the hair and helps to express the contents of the sebaceous glands

A

Arrector pili

76
Q

Secrete sebum composed of f.a., choloesterol,and
vitamin D

A

Sebaceous gland

77
Q

Primary gland in humans

A

Merocrine

78
Q

Predominant in domestic animals

A

Apocrine

MICROSCOPIC ANATOMY (Mrs. Lucia Rigos) (5 decks)

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