01 11 08 - Histology and Integument

01 11 08 - Histology and Integument -...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
hibanour@email.unc.edu 01/11/08 – Histology (continued) and the integumentary system A. Specific types of Epithelium 1. Simple Squamous – thin barrier allows great permeability: blood vessels, lungs a. Scale like, flat, very tight connections b. Found in places where quick diffusion is necessary, ex. Lungs, blood vessels i. Example of structure and function 2. Stratified Squamous – resists abrasion: skin, digestive tract, vagina a. Stratified-layered cell structure ex. Skin i. Anywhere where abrasion could take some of the layers of the skin off 3. Simple Cuboidal – less permeable than simple squamous. ducts & tubules; glands & kidneys a. One layer so it is simiple b. Thickness allows the cells to be more selective in what they allow in and out i. Found in tubules 4. Stratified Cuboidal – ignore, very rare a. More than one layer 5. Simple Culumnar – absorbtion or secretion (with goblet cells present); intestines a. Simple b. Tall and column like i. Found in places where there is very selective absorption or secretions 1. More selective than cuboidal a. Goblet cells- build up mucus and then secrete it into that space 6. Stratified Columnar - ignore, very rare a. 7. Transitional – stretches; urinary system a. Bladder can expand (unique) have to be very disenable b. When it stretches from collapsed verison all the cells can stretch out into one or two layers c. Pseudeostratified columnar – ciliated and contain many goblet cells; Respiratory i. Move dust out of lungs - Epitheial form glands by: o See notes for picture or slides a. Packs itself full of whatever they will secrete until full, cell ruptures and this kills the cell i. Known as holocrine b. Both spill onto surface B. Glandular Epithelium – organized secretory cells 1. Endocrine – release hormones to surrounding fluid and picked up by blood 2. Exocrine – release other secretions to epithelial surfaces through ducts a. Merocrine: cell fragments full of mucus or other substance breaks off from cell i. Secrete different things, secrete by packaging and releasing when they receive signal
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ii. Known as merocrine (only involves part of cell) a. Holocrine:
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

01 11 08 - Histology and Integument -...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online