Tissue 1 & 2

Name of the membrane that a connective tissue supporting the Epethial tissue

Basement Memebrane

What is an important special feature of cancerous epithelial cells

Fail to respect the boundaries of Basement membrane

What is basement membrane made of?

Basal Lamina that sits on top of reticular lamina

What is basal lamina and reticular lamina made of?

Basal lamina- supportive underlying sheet of glycoproteins

Reticular - Collagen fibres

What are

two important functions of the basement membrane?

????

Whta is the 4th structural characteristic of epethelia tissue?

Innervated but avascular?

name all 5 special characteristics and its explaination

- Polarity

- Specialized contacts: tight junctions & desmosome

- Supported by connective tissue: Basement membrane is composed of a basal lamina siting on top of a reticular lamina.

- Innervated but avascular

- Regeneration

What is innervated but avascular and HOW are they NOURISHED?

????

What does REGENRATION characteristic do?

Why is it NECESSARY?

???

Define the epithelial tissue

Sheet of cells COVERING body surface/ LINES body cavity

Epethelial tissue - 2 types

Covering and lining epithelial

Glandular epithelium

Name 6 functions of epithelia

?????

How many criteria to classify epithelia cells? What are they? Define each’s shape and charcteristics

2

(1) Cells shape → Squamos, Columnar

(2) Number of layers —→ Simple epithelia (thin basement membrane, has both laminas. membrane has single rods)

—> Stratified epithelia (long basement with many cell shapes)

List the 4 types of simple epithelia

1) Simple squamous epithelium

2) Simple cuboidal epithelium

3) Simple columnar epithelium

4) Pseudostratified (ciliated) columnar epithelium

Name the 1st simple epithelium and definition, function

1) Simple squamous epithelium

• Thin & permeable—→ allows FILTRATION + DIFFUSION

Sample body location of Simple squamous? Why??

Name 2nd simple epithelium and definition, function, body location- why?

Simple cuboidal epithelium: more cubicol and together

- for SECRETION + ABSORPTION

Kidney tubules, small glands

Name 3rd simple epithelium and definition, function, Sample body location?- why here only?

Simple columnar epithelium: vast

- SECRETION + ABSORPTION

• In the GI TRACT

Last sample epithelia? (check hint)

Pseudostratified (ciliated) columnar epithelia

What is Pseudostratified (ciliated) columnar epithelia?, sample body location? What is the appearance like?

Single layer with cilia + mucus secretion such as in the respiratory tract

STRATIFIED epithelium APPEARANCE

State which is which type of simple epithelia tissue

What is a STRATIFIED squamous epithelium, what do they do? Why? give location

Basal cuboidal cells

Protective role

-Undergo MITSOS for regenerating layers from below

Where???

What is the most widespread example of

stratified squamous epithelium?

What happens to the apical layers of cells

?????

what is Transitional epithelium? Function- How?

A stratified epithelium with MIX of columnar and squamous cell

Line bladder. How?

-Has basal layer in CUBOIDAL shape + atypical layers = allows flattened and squamous fulling happen

Define gland, give examples

1 or more cells that make & secrete a particular products

Endocrine, exocrine, unicellular/ multicellular

What is an endocrine Gland?

Ductless

From HORMONES

What is an Exocrine Glands

Mucouse/ sweat/ oil. salivary Gland/ LIVER/ PANCREAS

Are Exocrine glands unicellular exocrine gland / multicellular exocrine glands?

Both

Relation between ducts and glands?

Ducts offer physical framework of support to carry SECRETION.

Certain glands in EXOCIRNE glands don’t need ducts

Difference between unicellular exocrine glands and multicellular. How does CT help here?

Unicellular exocrine:

Mucus cells + Goblet cells (1 body)

- found in Digestive + respiratory tracts

• 1 cell with no duct

• 
  

Explanation: 1 body that secretes onto surface

• 
  

Multicellular exocrine glands:

Epithelium derived duct + secretory cells

- surrounded by CT (connective tissue)—→ brings BLOOD VESSELS & nerves

Explaination: (Gland itself is epithelium with ducts supported by CT the framework hold GLAND and physically support transport of blood supply + nerves.

types of multicellular exocrine glands, branched duct or not? where?

Tubular secretory structure = no duct branching

• Simple tubular: Eg Intestinal glands

• Simple branched tubular - Eg: Stomach gastric glands

Tubular secretory structure= Duct branching

• Compound tubular- Eg: Duodenal glands of SI (small intestine)

Alveolar secretory structure

• Simple alveolar (no example in human)

• Simple branched alveolar (Sebaceous= oil glands)

• Compound alveolar- Eg: Mammary glands

How many secretory methods?

3

most common ty of secretory methods?

Merocrine exocytosis secretion