Histo 1: Lip, tongue, salivary glands and exocrine pancreas

Identify

What does the outer layer of lip consist of?

Thin skin

What does the inner surface of the lip consist of?

  

What does the middle layer of the lip consist of?

What is the definition of the lip/red margin of the lips?

Modified skin that forms a transitional zone between mucous membrane and skin

What does the lip margin consist of? (red margin)

What does the macroscopic appearance of the tongue consist of?

What are the layers of the structure of the tongue?

1) Skeletal muscle: Vertical, transverse, and longitudinal skeletal muscle bundles

2) Mucous membrane:

• Stratified squamous epithelium

• The lamina propria / corium contains lingual glands and lingual tonsils

Compare the mucous membrane of the dorsal and the ventral surface of the tongue

Define lingual papillae and list the types

Small numerous elevations of the mucous membrane on dorsal tongue surface

Types:

• Filiform

• Fungiform

• Circumvallate

• Papilla foliata

Compare the filiform and fungiform papillae

Compare the circumvallate and foliate papillae

What are the types of salivary glands?

What is the general structure of major salivary glands?

1) Stroma:

• Contains capsule, septa, and reticular CT

• Then interlobar divides the gland into lobes

• THEN INTERLOBULAR divide gland into LOBULES

2) Parenchyma

• Contains secretory acini and excretory ducts

What is secretory acini formed of and its actions?

What are the types of salivary acini?

1) Mucous acini

2) Serous acini

3) Mixed acini

Compare mucous acinus to serous acinus

What is the mixed acinus?

A mucous acinus capped by a group of serous cells

Compare the main differences between major salivary glands

List and describe the duct system of salivary glands

Describe the straited ducts of the salivary glands UNDER L/M AND E/M

What is the structure of the pancreas?

1) Stroma:

• Contains capsule, septa, and reticular CT

• THEN INTERLOBULAR divides pancreas into LOBULES

2) Parenchyma

• Contains pancreatic acini and the duct system

Describe the pancreatic acini lining cells UNDER L/M AND E/M

List and describe the duct system of the exocrine pancreas