Histology- Git Table 1

ESOPHAGUS

STOMACH

SMALL INTESTINE

LARGE INTESTINE

TUNICA MUCOSA Epitheliu m

-Stratified squamous non-keratinizing epithelium

L. propria

-Areolar CT -Glands are found only at the upper and lower part(1/3) of esophagus Fxn: produce mucous to lubricate food

Glands Morpholo gy

- Simple columnar w/ striated border and goblet cells

-Fibro-reticular CT -very cellular -Glands and lymphocytic infiltration: PRESENT

-Fibroreticular CT -Glands and lymphocytic infiltration: PRESENT

-Superficial esophageal gland or esophageal cardiac gland -Compound tubular

-Cardiac glands -Compund tubular

-Crypts of Lieberkuhn

-Crypts of  Lieberkuhn -Simple tubular gland

-Not typical mucous cells

-Not typical mucous cells

Comp. cells

M. mucosae

↑ part- absent/thin; cannot be appreciated ↓part- thick; arranged ICOL (Inner Circular and Outer Longitudinal)

-Fundic gl glands -Simple branched tubular

-Mucous neck  cells: mucous -Parietal cells: HCl -Chief cells: pepsinogen granules -Enteroendocrine cells: histamine, serotonin, heparin -Smooth muscle arranged as ICOL

-Pyloric glands -simple branched, coiled tubular -Typical mucous cells

-gastric pits- funnel-shaped invagination of epith. (a.k.a FOVEOLA GASTRICA). -shallow in cardia but very deep in pylorus -INTERFOVEOLAR -INTERFOVEO LAR SPACE OR AREA

Other

-Simple tubular gland

-Areolar CT w/ abundant elastic fibers

-Dense CT

-Deep esophageal gland -Compound tubulo-acinar -Typical mucous cells

Absent Absent Absent

Tissue

↑part: Skeletal muscle ICOL

↓part:S ↓part: Smooth muscle

Smooth muscle

ICOL

3 layers IO-MC-OL (MC- middle circular- highly developed in pylorus)

COLON -Simple columnar epithelium w/ numerous goblet cells and thin striate border -Fibroreticular CT -Glands and solitary lymph nodules: PRESENT - Same w/ small intestine but crypts are larger, longer but cells of Paneth are absent -Crypts of Lieberkuhn -Simple tubular gland

-Absorptive columnar cells -goblet cells -enteroendocrine cells -paneth cells- has lysosomes that are bactericidal

-Absorptive columnar cells -goblet cells -enteroendocrine cells -paneth cells- has lysosomes that are bactericidal

-Absorptive columnar cells -goblet cells -enteroendocrine cells -paneth cells: ABSENT

- Smooth muscle arranged as ICOL

-Poorly developed

-Velvety (in texture) intestinal villi w/c are evagination of epith. -Intestinal gland- (Lieberkuhn) invagination of  epith.

-villi absent

-Smooth muscle arranged as ICOL -Thickest & well developed -villi abset making surface look smooth

TUNICA SUBMUCOSA -Dense CT

Comp. tissue Glands Morpholo gy Comp. cells

Arrange ment Special Struc.

APPENDIX -Simple columnar epithelium w/ goblet cells & distinct striate border

-Simple columnar(plain) -all cells are mucus secreting - MUCOUS SECRETORY EPITHELIAL SHEET (type of  gland) -mucous for protection -Fibroreticular CT - scanty seen in interfoveolar space only due to glands (fundic-most abundant)

-Submucosal glands of Brunner -Simple branched coiled tubular -Secretion is slightly alkaline TUNICA MUSCULARIS Smooth muscle ICOL

-Areolar CT

-Areolar CT

Absent Absent Absent

Absent Absent Absent

Smooth muscle

Smooth muscle

ICOL

ICOL

-Teniae coli- (causes the puckering); MUSCULARY BONDS -Haustrae coli- (packer) or (puckered) Has 3 teniae coli

thin CT covered by mes ot othelium

Rugae

Folds

Folds

Made up of areolar CT esophageal folds

dorsal surface of duodenum the last layer is  T. adventitia valves of Kerckring valvulae coniventes plicae circularis TUNICA ADVENTITIA

appendices apiploicae tag of fat (?)

absent