This document summarizes several lymphoid organs and their histological features. It discusses the palatine tonsil which contains crypts lined with stratified squamous epithelium. It also describes the thymus which lacks germinal centers and contains lobules divided into cortex and medulla regions filled with lymphocytes. Finally, it provides details on lymph nodes, spleen, and skin-associated lymphoid tissues.

1. Lymphoid

2. What organ? Palatine tonsil
crypt
Lined with?
Stratified squamous
epithelium

3. Secondary nodule

4. What organ? Thymus
No hylus
Capsule
lobules

5. cortex
medulla
No germinal centers
What are the areas filled with?
Lymphocytes

6. Hassall Corpuscle- enveloped by reticular cells
T Lymphocytes

7. What organ?
Spleen Fibrous capsule

8. Red pulp
White pulp
Secondary nodule

9. Central arteriole
PAL rich in T Lymphocytes

10. Red pulp with splenic cords
and venous sinuses

11. capsule
White pulp

12. What organ? Lymph node hilus
Medulla
paracortex
Cortex

13. Germinal center
Secondary nodule
All located in the outer cortex

14. Cortex
Afferent lymphatic vessel
Subscapular sinus
Capsule

15. Stomach
Primary lymphatic nodule
Unencapulated lymphoid tissue

16. Skin and Appendages

17. Thick Skin

18. Stratum spinosum
Dermal papillae
melanocytes

19. Thin Skin

20. Thin skin No thicker then
the rest of the
epidermis

21. Keratinized
Stratified Squamous
Epithelia
What is it?
Skin

22. Where are we? Keratinized Stratified
Thick Skin
Squamous
Epithelium
Dermis-
Solid
Eosinophilic
Tissue
Hypodermis=
Subcutis
Eosinophilic
Islands
What kind of tissue are the dermis & Hypodermis?
Dense Irregular Connective Tissue

23. What area of the skin? Hypodermis
Adipose Tissue
Peripheral Nucleus

24. Where are we? Thick Skin
Stratum Corneum
Stratum Granulosum
Stratum Spinosum
Stratum basale
Dermis

25. Dermis
Dense Irreg
Connective Tissue
Hypodermis

26. What is it? Thin Skin
Blue Stained
Elastic, Collagen,
& Reticular Fibers

27. ORAL REGION ESPHAGUS AND
STOMACH

28. tongue

29. Mucous
Glands
Serous Glands

30. filiform
Hyper keratinized
No tastebuds
Fungiform s mixed in
Skeletal muscle

31. tongue

32. circumvallate Rich in taste bud
Von Ebners Glands - Secretes a watery fluid
that dissolves food constituents
Serous glands

33. foliate

34. Stratified Squamous Epithelium
Lingual Salivary Glands -
Exocrine glands because
the secretion product
Is released into a cavity
(oral cavity).

35. esophagus

36. Stratified Squamous
Epithelium
sub mucosa
Muscularis
Mucosa – has
smooth muscle

37. stomach
mucosa
submusca

38. Lined by simple columnar epithelium
stomach
Gastric pits

39. Mucus secreting cells
Parietal cells
Produce HCL
Chief cells
Produce pepsinogen

40. duodenum

41. duodenum
Goblet cells
Brunners glands

42. submucosa
Circular smooth muscle
Longitudinal smooth
muscle
Auerbach plexus
Brunners glands
Muscularis mucosa

43. jejunum

44. serosa
submucosa villi
Muscularis
externa
plicae
mucosa

45. Simple columnar
Paneth cells
Contain
antibacterial
cells
Brush boarder
Goblet cells
Crypts of lieberkuhn

46. Ileum

47. Ileum
Payer patch
A lot of lymphocyte

48. colon
Crypts of lieberkuhn

49. Lymphatic nodule

50. myenteric plexus

51. Teniae coli

53. Stratified squamous
Anorectal junction
Simple
columnar

54. Keratinized squamous

55. appendix
Secondary lymphatic nodule

56. DIGESTIVE GLANDS

57. Submandibular Gland
Intralobular
striated duct
demilune
mucus serous

58. Submandibular Gland
capsule
Interlobular ducts
Pseudo stratified epithelium
Excretory gland

59. Parotid Gland

60. Parotid Gland Interlobular ducts
Intralobular
striated duct septa
Serous acini

61. Parotid Gland
Intralobular
striated duct
Intercalated ducts
Less cytoplasm
Simple cuboidal

62. pancreas
Islets of langerhand

63. pancreas
Zymogen granules
Islets of langerhand
With Alpha and Beta cells

64. pancreas
Interlobular duct
Simple columnar

65. pancreas
Acini
Zymogen granules
Centeroacinar cells

66. liver
Central vein
Portal vein
With CT
sinusoid

67. liver hepatocytes
Kupffer cells
The macrophage

68. gallbladder
Smooth m
serosa

69. gallbladder
Simple columnar
Lamina propira
Smooth m

70. RESPIRATORY SYSTEM

71. Smooth mucles
Trachea
thyroid
Trachealis muscle
esophagus

72. Hyaline cartilage
Trachea
submucosa
Lamina propria
Ciliated
pseudostatified
columnar

73. lung
artery
Bronchiole
Ciliated simple columnar

74. lung
alveoli
Alveoli duct

75. Type 2 pneumocyte (foamy)
Type 1 pneumocyte
Clara cell

76. Bronchus- has cartilage
lung
Ciliated psuedostratifided columnar