Chapter 8-1 Basic Tissue Flashcards
(47 cards)
Define turnover time
time it takes for newly divided cells to be completely replaced throughout the tissue
Time taken for cellst o divide during mitosis
Four types of tissue
- Epidermins
- Connective tissue
- Muscle
- Nerve
Epithelium of skin and oral mucosa are of what origin?
Ectodermal
Respiratory and digestive tract are of what origin?
Endodermal
Urinary tract is derived from…
Mesoderm
What cells make up the epithelium
Polyhedral cells
Epithelium is … (avascular/vascular)?
Avascular, having no blood supply
Describe epithelium regeneration
rapid cellular turnover and highly regenerative
Epithelial cells are joined by what type of intercellular junctions
Desmosomes
Two main categories of epithelium
- simple
- stratified
Describe simple epithelium
single layer of epithelial cells
Three classification of tissue under simple epithelium
Simple squamous
Simple cuboidal
Simple Columnar
Describe simple squamous epithelium
flattened platelike cells
Where are squamous epithelium cells found
Blood, lymphatic vessels, heart, serous cavities, lungs, kidneys
Endothelium
simple squamous epithelium lining of vessels and serous cavities
Simple cuboidal epithelium
cube-shaped cells that line ducts of glands (such as salivary glands)
What type of cells do simple cuboidal epithelium consist of
Rectangular cells
What type of cells are the inner enamel epithelium make up of
Simple columnar epithelium
Pseudostratified columnar epithelium
Cells’ nuclei appear at different levels
What type of cells makes up the nasal cavity
pseudostratified columnar epithelium
Stratified epithelium
2 or more layers of cells
Stratified squamous epithelium
type of cell that make up most of epithelium in the body
What is retes ridges/rete pegs
interdigitation of outer epithelium with deeper connective tissue
Epidermis
superficial layer of skin
