(P) Lec 2: Epithelial Tissue Flashcards
Groups of cells similar in structure and intercellular substance performing a specific function
Tissue
T or F: Tissues have the same function but different morphology
False (same function and morphology)
A combination of tissues in appropriate patterns and proportions
Organs
Different organs associated with one another in variable proportions
Organ Systems
Basic Types of Tissue:
> The external or internal covering or lining of the body (e.g. skin and glands)
Epithelial
What basic type of tissue are skin and glands?
Epithelial
Basic Types of Tissue:
> The supporting/binding tissue
> Provides general structure, mechanical strength, space filling, and physical and metabolic support for more specialized tissues
Connective
What basic type of tissue are collagen, reticular fibers, and elastic tissue (the dermis)?
Connective
T or F: Connective tissue’s extracellular matrix exists in abundant amounts
True
Basic Types of Tissue:
> Made up of elongated cells specialized for contraction and movement
Muscular
What are the 3 subtypes of muscular tissue?
> Smooth
Skeletal
Cardiac
Basic Types of Tissue:
> Important for the interpretation of stimuli
> Composed of cells with long fine processes specialized to receive, generate, and transmit nerve impulses
Nervous tissue
Basic Types of Tissue:
> Cells are aggregated polyhedral
> Extracellular matrix is in small amounts
> Lines surfaces or body cavities; for glandular secretion
Epithelial
Basic Types of Tissue:
> Has several types of fixed and wandering cells
> Extracellular matrix is in abundant amounts
> Supports and protects tissues/organs
Connective
Basic Types of Tissue:
> Cells are elongated and contractile
> Extracellular matrix is in moderate amounts
> Used in strong contractions and body movements
Muscular
Basic Types of Tissue:
> Cells are elongated with extremely fine processes
> Extracellular matrix is in very small amounts
> Transmits nerve impulses
Nervous
Tissue:
→ composed of cells in close apposition with little to no intercellular substance
→ no ground matrix and intercellular fibers
→ there is strong adhesion between cells attached to a thin layer of extracellular membrane
→ cellular sheets are formed
Epithelial
The basement membrane is also called as?
Basal Lamina
This separates the epithelium from the connective tissue (is non-cellular) and nutrients for the epithelial cells must diffuse across this
Basement membrane
T or F: Epithelial tissues are vascular
False (avascular; blood vessels never cross the basement membrane)
Three Germ Layers:
> An example of this is the epidermis of the skin and epithelium of the cornea
Ectoderm
Three Germ Layers:
> An example of this is the epithelium of the kidneys and reproductive tracts of both males and females
Mesoderm
Three Germ Layers:
> An example of this is the epithelium of the GIT
Endoderm
What is the principal function of epithelial tissue?
Covering, Lining, and/or Protection