Tissue Level of Organization Flashcards
What are the four types of tissue?
- Epithelial
- Connective
- Muscle
- Nervous
The epithelia are a layer of cells that covers _________________________
internal or external surfaces
Glands are structures that produce _________________
fluid secretions
What are the four functions of the epithelial tissue?
- Provide physical protection
- Control permeability
- Provide sensation
- Produce specialized secretions
What are the five characteristics of epithelia?
- Polarity
- Cellularity
- Attachment
- Avascularity
- Regeneration
What are the three specializations of epithelial cells?
- Protection
- Permeability
- Protection and messaging
How is the integrity of epithelia maintained? (3 ways)
- Intercellular connections
- Attachment to basement membrane
- Epithelial maintenance and repair
What are the three types of cell junctions?
- Gap junctions
- Tight junctions
- Desmosomes
When classifying epithelia, what are the three shape types?
- Squamous
- Cuboidal
- Columnar
When classifying epithelia, what are the two layer types?
- Simple (single layer)
- Stratified (several layers)
The mouth and anus are ___________(1)____________. Everything else in the middle of the body are ________(2)_________.
1) Squamous epithelia
2) Columnar epithelia
________________ forms the inner lining of heart and blood vessels
Endothelium
____________ squamous epithelia protects against mechanical stresses as keratin adds strength and water resistance
Stratified
Simple Squamous Epithelium are located in which two places?
- Endothelia lining heart
- Blood vessels
What are the locations of Stratified Squamous Epithelium? What is its major function?
Locations:
- skin
- lining of mouth, throat, esophagus, rectum, anus
Function:
- protection against abrasion
What is the major function of simple cuboidal epithelia?
Secretion and absorption
What are the locations and functions of simple cuboidal epithelium?
Locations:
- Kidney tubules
- Thyroid gland
Functions:
- Secretion, absorption
Transitional epithelia can be found in which human organ?
Urinary bladder
Transitional epithelia can tolerate repeated cycles of ____________ without damage
Stretching
Columnar epithelia are located in which three human organs?
- Stomach
- Small intestine
- Large intestine
Endocrine or Exocrine glands: which one releases hormones into the bloodstream?
Endocrine
Endocrine or Exocrine glands: which one discharges secretions through ducts onto epithelial surfaces?
Exocrine