Chapter 8-1 Basic Tissue Flashcards
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
Basal Lamina
superficial layer of basement membrane
What produces the basal lamina
epithelium
What is connective tissue derived from
Somites (mesoderm)
What type of tissue is most abundant?
Connective tissue
Connective tissue is … (renewable/nonrenewable) and vascularized/nonvascularized)
renewable and vascularized
What is the most common cell type in connective tissue
Fibroblasts
What is the main connective tissue fiber type
Collagen fibers
What are collagen fibers composed of
Fibrils (made up of microfibrils)
What are the three types of fibers
Collagen fiber
Elastic fibers
Reticular Fibers
What type of fibers make up the oral cavity - soft palate
Elastic fibers
Elastic fibers
tissue that have ability to stretch and return to original shape
Reticular fibers
found in relationship to evolving embryonic tissue
Soft connective tissue
tissue found in deeper layers of skin and oral mucosa
Connective tissue proper
Firm connective tissue
different types of cartilage
Rigid, hard
consists of bone
Fluid
consists of blood with its components and lymph
What is the connective tissue proper
loose and dense connective tissue found together in two adjoining layers
Dermis
connective tissue proper in skin
Hypodermis
subcutaneous tissue (loose connective tissue and adipose connective tissue), blood vessels, nerves
Loose connective tissue
papillary layer which forms connective tissue papillae
Dense connective tissue
dense layer / reticular layer
Describe turnover of connective tissue
occurs through production of fibers and intercellular substance by fibroblasts
Turnover time is slower compared to epithelium
Granulation tissue
immature connective tissue
