1. Mt SAC Lab Unit 3 Histology

2. Tooth

4. Enamel Dentin Pulp

5. Tongue

6. Taste bud

7. Tongue Cross section of skeletal muscle Mucous acini of sublingual salivary gland Longitudinal section of skeletal muscle OMIT: Serous cells of salivary gland

8. Tongue Longitudinal section of skeletal muscle

9. Salivary Glands You have one slide with all three glands on separate sections. Saliva consists of watery (serous) and mucous (thicker, sticky) secretions. Sublingual – Contains only mucous cells Parotid – Contains only serous cells (which secrete into ducts) Submandibular (slide is labeled submaxillary) – Contains both mucous and serous cells

10. Sublingual Salivary gland Mucous acinus with mucous cells inside Sublingual glands have only mucous cells

11. Sublingual Salivary gland Sublingual glands have mostly mucous cells Mucous acinus with mucous cells inside

12. Parotid salivary gland Serous cells Ducts Parotid glands have many ducts

13. Parotid Salivary gland Duct Serous cells Parotid glands have many ducts

14. Parotid Salivary gland Parotid glands have many ducts Serous cells Ducts

15. Parotid Salivary gland Parotid glands have many ducts Serous cells Ducts

16. Submandibular Salivary Gland Duct Serous cells Mucous acinus with mucous cells inside Submandibular glands have both mucous cells and ducts

17. Submandibular Salivary Gland Submandibular glands have both mucous cells and ducts Duct Serous cells Mucous acinus with mucous cells inside

18. Submandibular Salivary Gland Submandibular glands have both mucous cells and ducts Duct Serous cells Mucous acinus with mucous cells inside

19. Small Intestine Duodenum Jejunum Ileum

20. Duodenum Plica Villus Plica are the folds into the intestine. Villi are the finger-like projections into the lumen. Plica and villi are found in all three parts of the small intestine.

21. Duodenum Mucosa Submucosa Muscularis externa Adventitia

22. Duodenum Villus Brunner’s glands Brunner’s glands are only found in the duodenum. They produce bicarbonate to deactivate the acidity of the chyme from the stomach. The villi of the duodenum are short and fat

23. Layers of the Small Intestine Mucosa – Villi are located here Submucosa – Brunner’s glands are located here (duodenum only) Muscularis externa – Made of smooth muscle to push food along Serosa (or adventitia) – Made of loose connective tissue

24. Duodenum Villus Mucosa Submucosa Muscularis externa Serosa Brunner’s glands

25. Jejunum Plica Villus

26. Jejunum Villi The villi of the jejunum are tall and skinny

27. Jejunum Mucosa Submucosa Muscularis externa Serosa

28. Ileum Plica Villus

29. Ileum The villi of the ileum are not individually separate Villi

30. Ileum Mucosa Submucosa Muscularis externa Serosa

31. Colon

33. Villus Goblet Cells The villi of the colon are blending together and are full of goblet cells

34. Colon Goblet cells

35. Colon Mucosa Submucosa Muscularis externa Serosa

36. Appendix

37. Lymphatic nodules

38. Appendix Submucosa Mucosa Muscularis externa Serosa

39. Liver Hepatic triad (artery, vein, bile duct) Central vein Hepatic lobules

40. Liver Lobule Central veins Hepatocytes Sinusoids

41. Hepatocytes Sinusoids Central vein Hepatic triad

42. Hepatocytes Sinusoids Central vein Hepatic triad

43. Hepatocytes Sinusoids Central vein

44. Gallbladder

46. Mucosa Submucosa And Muscularis externa blended in one layer Serosa

47. Gallbladder

49. Mucosa Serosa Submucosa And Muscularis externa blended in one layer

50. Pancreas Acinar cells (secrete digestive enzymes and bicarbonate) Islet of Langerhans (secretes insulin)

51. Pancreas Acinar cells Islet of Langerhans

52. Pancreas Islets of Langerhans Acinar cells

53. Kidney Has two regions Cortex – Glomeruli and convoluted tubules located here Medulla – Only convoluted tubules located here

54. Kidney Bowman’s capsule Convoluted Tubules Glomerulus Capsular space

55. Kidney Cortex Medulla Glomerulus Convoluted tubules

56. Kidney Glomerulus Convoluted tubules

57. Kidney Glomerulus Convoluted tubules

58. Pancreas Islets of Langerhans Acinar cells

59. Lung Bronchiole Alveoli

60. Lung Alveoli

61. Lung Alveolar wall Alveolar space

62. Parathyroid Gland

63. Many nuclei, all the same size and shape. Looks like view from above of FBI hats…makes you paranoid, parathyroid!

64. Parathyroid Gland Many nuclei, all the same size and shape. Looks like view from above of FBI hats…makes you paranoid, parathyroid!

65. Thyroid Gland Follicles with colloid

66. Thyroid Gland Follicles with colloid

67. Adrenal Gland

71. Capsule Cortex Adipose

72. Adrenal Gland Capsule Cortex Adipose

73. Adrenal Gland Adipose Capsule Cortex

74. Mammary Gland

77. Alveoli with colloid (milk) Duct

78. Ovary, Cat Cortex (where developing gametes are) Medulla

79. Ovary, Cat Primary follicles Graafian follicles Secondary follicle

80. Ovary, Cat Corpus luteum

81. Ovary, Cat Primary follicles Secondary follicle Graafian follicle

82. Ovary, Cat Primary follicles Secondary follicle Graafian follicle

83. Ovary, Cat Oocyte (called an ovum after it is released) Antrum (contains fluid that fills up and pops the follicle open during ovulation) Corona radiata (contains nutrients for the egg as it travels in fallopian tube) Zona pellucida (blue ring, where sperm bind) Granulosa cells (make sex hormones and growth factors)

84. Corpus Luteum, Monkey

87. Fallopian Tube

88. Uterus

89. Uterus Endometrium and Myometrium Endometrium Myometrium Uterine glands

90. Uterus Endometrium Uterine glands

91. Uterus Endometrium Uterine glands

92. Uterus Myometrium

94. Placenta

95. Chorionic villi with fetal blood Maternal blood

96. Placenta Chorionic villi with fetal blood Maternal blood

97. Umbilical Cord Umbilical arteries Umbilical vein

98. Testes; Seminiferous tubules

100. Interstitial cells of Leydig (secrete testosterone)

101. Spermatozoa

103. Flagellum Head

104. Spermatozoa Flagellum Head Midpiece