Tissues Flashcards
Four major tissues in body
- Muscle
- Connective
- Epithelial
- Nervous
What are three functions of epithelial tissues
Three s’s (remember: snake skin!)
- Shield
- Secrete (and absorb)
- Sense
What connects epithelial tissue to deeper tissue?
Basement membrane
What are six physical traits of epithelial tissues?
Onions
- LAYERS - have one or more layers of tightly-packed cells
- SURFACES - Have free apical surface and fixed basal surface
- NO BLOOD - No blood vessels
- NERVES - Lots of nerves
- REGENERATION - High regenerative capacity
- BASEMENT- Sitting on top of basement membrane
Microscopic study of tissues
Histology
Two different types of epithelial cell layers
Simple = one layer
Stratified = more than one
Three different types of epithelial cell shapes
Flat and thin = squamous
Square-shaped = cuboidal
Rectangular = columnar
flat and thin epithelial tissue called
Squamous tissues
Cuboidal tissues
square-shaped epithelial tissue
rectangular tissue
columnal-shaped epithelial tissue
Epithelial get nutrients through
diffusion and filtration from basement membrane
Two unique types of epithelial tissues
- Transitional
- Pseudostratified
Where is transitional epithelial tissue?
Urinary tract
Where is pseudostratified epithelial tissue?
Trachea
This type of epithelial tissue shape makes it easy for diffusion to occur
simple squamous
Four types of epithelial cell connection (junctions)
- Tight junctions
- Adhering junctions
- Desmosomes
- Gap junctions
Tight junctions
type of connection between epithelial cells - bands of cell membranes (like a wall), encircle whole cell
Adhering junctions
type of connection between epithelial cells - deeper than tight, encircle whole cell
Desmosomes
type of epithelial cell junction - button or snap-like junctions
Gap junctions
Type of epithelial juncture (pore)
5 functions of connective tissues
Spiderwebs
- Support soft body parts
- Bind structures together
- Fat storage
- Exchange nutrients and metabolic waste
- Defense and protection
6 examples of connective tissues
- Bone
- cartilage
- ligaments
- tendons
- blood
- adipose tissue
What does connective tissue look like?
These specialized cells, which found in many connective tissues, contain large amount of lipids
adipocyte (fat tissue)
What are five physical traits of connective tissues?
- protein fibers
- ground substance
- there is lots of space between cells
- lots of blood vessels
- Protein fibers and ground substance form extracellular matrix (ECM)