IHP Epithelial Tissue

What are the 4 types of tissues

1. epithelial

2. connectives

3. nerve

4. muscle

What are the 2 kinds of classification within tissue types

1. morphological (epithelial and CT)

2. functional (muscle and nerve)

What is epithelium

• covers exterior body surfaces

• covers internal closed cavities (vascular system- arteries vein capillaries)

• body tubes that communicate w the exterior (alimentary- digestion, respiratory, genitourinary- repro kidney bladder)

• has basement membranes

• has C-CAMs

Types of intercell junctions (5)

tight, adhering, men, hate, girls

1. (zonula occludens) tight: like a belt, muffin top, fuses adjacent cell membranes and prevents movement of materials between them

2. zonula adhering: anchor with actin filaments, and CAMs

3. Macula adherin: aka desmosomes, intermediate cytokerfilaments

4. hemidesmosomes: intermediate filaments, integrin proteins for tight adhesion to basal lamina

5. gap: help epithelial cells communicate and transport tings, have connexins to form pores

What are the layer options and types (shapes) of cell posibilities

layers:

• simple

• stratified

Cells:

• squamous

• cuboidal

• columnar

the 2 special types of epithelium and how to differentiate them

1. pseudostratified epithelium: actually simple but all cells rest on BM

2. transitional epithelium: lower uterine tract lining, have rounded tops

What is endothelium

simple squamous, lines blood and lymphatic vessels (specialized)

What is endocardium

epithelial lining of ventricles and heart aorta

What is mesothelium

lines walls of closed body cavities (abdominal, pericardial, pleural)

What is the difference, between microvilli, stereocilia, cilia

microvillia: increases surface area (non motile)

stereocilia: male repro organs and inner ear (non motile)

cilia: can be motile

What are goblet cells

• mucus producing

• lining of intestines and respiratory

• allergies and spice

• form tubules

What are serous glands

• watery

• rich in enzymes

What are mixed glands

combo of mucus and serous

Types of exocrine glands and how they work

1. merocrine: no loss of cytoplasm, just leave

2. apocrine, apical cytoplasm loss

3. holocrine: whole cell loss

What are these four exocrine glands called

Left to right:

1. simple tubular

2. simple coiled tubular

3. simple branched tubular

4. simple branched acinar

What are the three kinds of specialized epithelial cells

• myoepithelial: muscle contraction

• diffuse into neruroendocrine system: secrete transmitters

• steriod secreting cells