Mt SAC Lab Unit 3 Histology

Tooth

Enamel Dentin Pulp

Tongue

Taste bud

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

Tongue Longitudinal section of skeletal muscle

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

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

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

Parotid salivary gland Serous cells Ducts Parotid glands have many ducts

Parotid Salivary gland Duct Serous cells Parotid glands have many ducts

Parotid Salivary gland Parotid glands have many ducts Serous cells Ducts

Parotid Salivary gland Parotid glands have many ducts Serous cells Ducts

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

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

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

Small Intestine Duodenum Jejunum Ileum

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.

Duodenum Mucosa Submucosa Muscularis externa Adventitia

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

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

Duodenum Villus Mucosa Submucosa Muscularis externa Serosa Brunner’s glands

Jejunum Plica Villus

Jejunum Villi The villi of the jejunum are tall and skinny

Jejunum Mucosa Submucosa Muscularis externa Serosa

Ileum Plica Villus

Ileum The villi of the ileum are not individually separate Villi

Ileum Mucosa Submucosa Muscularis externa Serosa

Colon

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

Colon Goblet cells

Colon Mucosa Submucosa Muscularis externa Serosa

Appendix

Lymphatic nodules

Appendix Submucosa Mucosa Muscularis externa Serosa

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

Liver Lobule Central veins Hepatocytes Sinusoids

Hepatocytes Sinusoids Central vein Hepatic triad

Hepatocytes Sinusoids Central vein Hepatic triad

Hepatocytes Sinusoids Central vein

Gallbladder

Mucosa Submucosa And Muscularis externa blended in one layer Serosa

Gallbladder

Mucosa Serosa Submucosa And Muscularis externa blended in one layer

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

Pancreas Acinar cells Islet of Langerhans

Pancreas Islets of Langerhans Acinar cells

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

Kidney Bowman’s capsule Convoluted Tubules Glomerulus Capsular space

Kidney Cortex Medulla Glomerulus Convoluted tubules

Kidney Glomerulus Convoluted tubules

Kidney Glomerulus Convoluted tubules

Pancreas Islets of Langerhans Acinar cells

Lung Bronchiole Alveoli

Lung Alveoli

Lung Alveolar wall Alveolar space

Parathyroid Gland

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

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

Thyroid Gland Follicles with colloid

Thyroid Gland Follicles with colloid

Adrenal Gland

Capsule Cortex Adipose

Adrenal Gland Capsule Cortex Adipose

Adrenal Gland Adipose Capsule Cortex

Mammary Gland

Alveoli with colloid (milk) Duct

Ovary, Cat Cortex (where developing gametes are) Medulla

Ovary, Cat Primary follicles Graafian follicles Secondary follicle

Ovary, Cat Corpus luteum

Ovary, Cat Primary follicles Secondary follicle Graafian follicle

Ovary, Cat Primary follicles Secondary follicle Graafian follicle

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)

Corpus Luteum, Monkey

Fallopian Tube

Uterus

Uterus Endometrium and Myometrium Endometrium Myometrium Uterine glands

Uterus Endometrium Uterine glands

Uterus Endometrium Uterine glands

Uterus Myometrium

Placenta

Chorionic villi with fetal blood Maternal blood

Placenta Chorionic villi with fetal blood Maternal blood

Umbilical Cord Umbilical arteries Umbilical vein

Testes; Seminiferous tubules

Interstitial cells of Leydig (secrete testosterone)

Spermatozoa

Flagellum Head

Spermatozoa Flagellum Head Midpiece