Epithelial Tissue Flashcards
Functions of connective tissues
Fills internal spaces, binds organs together, transports materials within the body and stores reserve energy
Functions of muscle tissue
Specialised for contraction; generates the physical force needed to make body move
Functions of neural tissue
- Carries information from one part of the body to another in the form of electrical impulses
- Helps maintain homeostasis
Define epithelial tissue
Line the cavities and surfaces of blood vessels and organs throughout the body
Characteristics of epithelial tissue (5)
- Apex always faces an open space
- Cells are closely packed together
- Cells are polarised
- Base always sits on a basement membrane
- Cells are regenerative
Are epithelial tissues vascular or avascular?
Avascular which means they must get rid of their waste at their apical or basal surfaces by diffusion or absorption
Functions of epithelial tissue (9)
- Forms boundaries
- Secrete
- Filter
- Line and surface
- Microvilli
- Cillia
- Protects
- Absorb
- Line
Expand on ‘forms boundaries’ as a function for epithelial tissue (2)
- Permeable (absorption)
- Impermeable (water, bacteria, toxins)
Expand on ‘secrete’ as a function for epithelial tissue
Milk, mucous, perspiration, digestive enzymes, hormones
Expand on ‘filter’ as a function for epithelial tissue
-Regulation of movement of gases, macromolecules, fluid
Expand on ‘line and surface’ as a function for epithelial tissue
Transcellular transport
Expand on ‘microvilli’ as a function for epithelial tissue
Increases surface area of cells
Expand on ‘cillia’ as a function for epithelial tissue
Substances move across the epithelial surface by synchronised beating of cillia
Expand on ‘protects’ as a function for epithelial tissue
Abrasion, dehydration
Expand on ‘absorb’ as a function for epithelial tissue
Surface area, intestine, respiratory epithelia
