Tissues Flashcards
What are the four primary types of tissues?
Epithelial, Connective, Muscle, Nervous
Which one of the four types of primary tissues have the following functions:
- Cover & Line other Tissues
- Protect Underlying Tissues
- May Absorb, Secrete, or Excrete Biochemical Substances
- May Play a Role in Reception of Sensory Input
Epithelial Tissue
What is an example of (location) epithelial tissue?
Skin
What does avascular mean?
Doesn’t have it’s own blood supply
On an epithelial cell, which surface faces the lumen or outside of the organ?
Apical Surface
On an epithelial cell, which surface faces the basal lamina and blood vessels?
Basal Surface
Most epithelial cells are innervated. What does innervated mean?
Provides sensory input to the nervous system
On an epithelial cell, which surfaces are connected to neighboring cells by junctional complexes?
Lateral Surface
Epithelial tissue is classified by which three characteristics?
Number of Layers of Cells, Shape of Cells, Surface Specializations
What are the two groups of the epithelial characteristic “number of layers of cells”?
Simple, Stratified
How many layers of epithelial cells does a “simple” tissue have?
One
How many layers of epithelial cells does a “stratified” tissue have?
Many
Think stadium seats
What are the three groups of the epithelial characteristic “Shape of Cells”?
Squamous, Cuboidal, Columnar
What shape are squamous epithelial cells?
Flat
What shape are cuboidal epithelial cells?
Square/Cubed
What shape are columnar epithelial cells?
Rectangular
What are the three groups of the epithelial characteristic “Surface Specializations”?
Smooth, Microvilli, Cilia, Keratin
Which epithelial surface specialization increases cell surface area for absorption/secretion?
Microvilli
Where can the epithelial surface specialization “microvilli” be found?
GI Tract
Which epithelial surface specialization coordinates beats for propulsion? (hairlike)
Cilia
Where can the epithelial surface specialization “cilia” be found?
Respiratory Tract
Which epithelial surface specialization is used to protect and waterproof?
Keratin
Where can the epithelial surface specialization “keratin” be found?
Skin
`What does “simple squamous epithelium” mean?
Epithelial Tissue with One Layer of Flat Cells
What type of epithelium is described below?
- Fragile, Thin Cells
- Flat & Smooth
- Found lining surfaces involved in the passage of either gas or liquid
Simple Squamous Epithelium
Where can simple squamous epithelium be found?
Lining Blood Vessels/Alveoli of Lungs
What does “simple cuboidal epithelium” mean?
Epithelial Tissue with One Layer of Cubed/Square Cells
What type of epithelium is described below?
- Single Layer of Cube-Shaped Cells
- Round, dark-staining nuclei which are aligned in a single row
- Occur in areas of the body where secretion and absorption take place
Simple Cuboidal Epithelium
Where can “simple cuboidal epithelium” be found?
Surface of Ovaries/Tubules of Kidneys
What does “simple columnar epithelium” mean?
Epithelial Tissue with One Layer of Rectangular Cells
What type of epithelium is described below?
- Elongated cells that are tightly packed together
- Nuclei aligned in a row at the base of the cell
- Found in many excretory ducts as well as in the digestive tract
Simple Columnar Epithelium
Where can “simple columnar epithelium” be found?
Uterine Tubes/ Entire Lining of GI Tract
What type of cell is found in the respiratory or intestinal tracts that secrete mucus?
Goblet Cells
What does “stratified squamous epithelium” mean?
Epithelial Tissue with Many Layers of Flat Cells