Digestive Microanatomy, Model, & Experiment

Label parts of a hollow organ. [mucosa, submucosa, muscularis externa (circular & longitudinal layers), serosa, muscularis mucosa, peyer’s patch]

a = mucosa

b = muscularis mucosa

c = peyer’s patch

d = submucosa

e = muscularis externa

f = X

g = serosa

h = circular layer

i = longitudinal layer

Label parts of a hollow organ. [villus, lacteal, goblet cell, intestinal crypt, intestinal gland, enteric neuron]

a = goblet cell

b = villus

c = lacteal

d = intestinal gland

e = enteric neuron

f = intestinal crypt

Label components of the oral cavity. [uvula, gingiva, oral vestibule, hard palate, soft palate]

a = hard palate

b = oral vestibule

c = gingiva

d = soft palate

e = uvula

Label parts of a tooth. [enamel, dentin, cementum, pulp cavity, apical foramen, root canal, crown, root]

a = enamel

b = dentin

c = pulp cavity

d = cementum

e = root canal

f = apical foramen

g = crown

h = root

Label the salivary glands.

a = sublingual

b = submandibal

c = parotid

Label parts of the stomach. [fundus, body, cardiac region, pyloric canal, pyloric antrum, pyloric sphincter, cardiac sphnicter, lesser curvature, greater curvature]

a = cardiac sphincter

b = cardiac region

c = fundus

d = pyloric sphincter

e = pyloric canal

f = lesser curvature

g = pyloric antrum

h = body

i = greater curvature

Label the 4 types of teeth.

a = molar

b = premolar

c = canine

d = incisors

Label parts of the liver. [right lobe, left lobe, gall bladde, hepatic portal vein, hepatic artery, inferior vena cava, falciform ligament]

a = right lobe

b = falciform ligament

c = hepatic artery

d = hepatic portal vein

e = inferior vena cava

f = gall bladder

g = left lobe

Label path of bile and pancreatic secretions. [right hepatic duct, left hepatic duct, cystin duct, common bile duct, common hepatic duct, pancreatic duct, accessory pancreatic duct, hepatopancreatic ampulla, pancreas, duodenum, gall bladder]

a = left hepatic duct

b = right hepatic duct

c = gall bladder

d = duodenum

e = cystic duct

f = pancreas

g = pancreatic duct

h = accessory pancreatic duct

i = common bile duct

j = hepatopancreatic ampulla

k = common hepatic duct

Label the lower abdomen. [stomach, duodenum, jejunum, ileum, colon]

a = stomach

b = duodenum

c = colon

d = jejunum

e = ileum

Label parts of the colon. [cecum, ascending colon, transverse colon, descending colon, sigmoid colon, appendix, mesocolon, hepatic flexure, splenic flexure, haustra, teniae coli]

a = hepatic flexure

b = ascending colon

c = cecum

d = appendix

e = transverse colon

f = mesocolon

g = sigmoid colon

h = splenic flexure

i = descending colon

j = haustra

k = teniae coli

Label parts of the rectum. [rectum, anus, rectal valve, external anal sphincter, anal columns]

a = rectal valve

b = rectum

c = external anal sphincter

d = anal columns

e = anus

Label histology of the liver. [hepatic triad, central vein, hepatic artery branch, hepatic portal vein branch, bile ductile, hepatocyte, sinusoid]

a = central vein

b = bile ductile

c = hepatic portal vein

d = hepatic artery branch

e = hepatic triad

f = sinusoid

g = hepatocyte

Label histology of the liver. [hepatic triad, central vein, hepatocyte, sinusoid]

a = hepatic triad

b = sinusoid

c = hepatocytes

d = central vein

Identify and label the tissue.

a = lobules (glandular epithelial cells)

b = duct

c = pancreas

d = islets of langerhans

Identify and label this gland.

a = mucous acini

b = striated duct

c = submandibular gland - salivary gland

Environment of digestive enzymes

• temp. 37 C

  • < 60 C = denature, no longer functioning properly

  • > 0 C = decrease to no activity

• pH sensitivity

  • indicates where within pathway of digestion enzyme primarily functions

Environment of digestive enzymes

• temp. 37 C

  • < 60 C = denature, no longer functioning properly

  • > 0 C = decrease to no activity

• pH sensitivity

  • indicates where within pathway of digestion enzyme primarily functions

Carbohydrate digestion

1. Polysaccharide

   • starch

2. enzyme

   • amylase

3. Disaccharide

   • maltose/dextrose

4. Monosaccharide

   • glucose

Carbohydrate digestion

1. Polysaccharide

   • starch

2. enzyme

   • amylase

3. Disaccharide

   • maltose/dextrose

4. Monosaccharide

   • glucose

Digestion results

• IKI color test = blue/black

  • starch present = didn’t breakdown!

• Benedict’s solution = orange/yellow/green

  • reduced sugar = breakdown occurred!

Digestion results

• IKI color test = blue/black

  • starch present = didn’t breakdown!

• Benedict’s solution = orange/yellow/green

  • reduced sugar = breakdown occurred!