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What are the 4 types of tissues?
What are the characteristics of epithelial tissue?
- Consists of glands
- is avascualar (without blood vessels)
Where is epithelial tissue found?
- Digestive tract
- Respiratory tract
- Body cavities
How is the physical barrier formed?
- Epithelial cells are tightly attached forming a physical barrier
- *Connected with CAMs (cell adhesion molecules)
- *Have tight junctions, gap junctions and desmosomes
Epithelial cells are polar.
True or false?
What are the microvilli and cilia for on the apical surface?
- Cillia-movement of materials across the epithelial surface
What is the name of the underlying surface of an epithelial cell?
What is the basal layer anchored to?
A basement membrane (extracellular matrix) that consists of proteins
What two types of tissues are held together by the basement membrane?
Epithelial and connective
What are the layers of epithelial tissue?
- Simple: single layer
- Stratified: two or more layers
What are the three cell shapes found in epithelial tissue?
- Squamous: flat, fried egg appearance
- Cuboidal: cube
- Columnar: rectangular w/nucleus towards basement membrane
What is an example of simple columnar epithelium?
Single layer of epithelial tissue found lining the digestive tract
What is an example of stratified squamous epithelium?
Multiple layers of epithelial tissue that can be found covering the surface of the skin and mouth
What are the functions of epithelial tissue?
- Regulates permeability
- Detects changes in the environment
- Specialized epithelial cells produce secretions
What are the characteristics of connective tissue?
- Deep tissue, found throughout the body
- Very diverse
- Consists of cells plus extracellular matrix/fluid
What are the functions of connective tissue?
- Provides support and protection for internal organs/tissues
- Transports materials (ex. nutrients)
- Stores energy (fatty tissue)
- Protects the body from macrophages
What are the three types of connective tissue?
- connective tissue proper
- fluid connective tissue
- supporting connective tissue
what types of cells do the connective tissue proper consist of?
fibroblasts, macrophages and adipocytes
what three fibers do connective tissue proper consist of?
- collagen fibers
- elastic fibers
- reticular fibers
what substance is like a thick syrup that fills the spaces between the cells and fibers of connective tissue proper?
ground substance (extracellular fluid)
what are the two types of connective tissue proper?
- loose connective tissue
- dense connective tissue
what are the characteristics of loose connective tissue?
- functions in supporting epithelia and blood vessels, and in protecting organs
- includes fatty tissue
what are the characteristics of dense connective tissue?
- strong tissue that functions in supporting bones, muscles and organs
- includes tendons and ligaments
what are the characteristics of fluid connective tissue?
- consists of red/white blood cells
what are the characteristics of supporting connective tissue?
consists of desne ground substance and tightly packed fibers
what are the three types of cartilage found in supporting connective tissue?
what are the cells in supporting connective tissue that produce exteacellular matrix (cartilage)?