list the functions of epithelial tissue:
cellular, polar, attached, avascular, innervated, high regeneration capacity
what are the three classifications of epithelium based on cell layers?
simple, stratified, pseudostratified
what are the classifications of epithelium based on shape?
squamous, cuboidal, columnar, transitional
In general, where is simple squamous epithelium found?
only in protected regions such as alveoli or lining the lumen of blood vessel walls
what are the functions of simple squamous epithelium?
it allows for rapid exchange of nutrients and waste between blood and the interstitial fluid surrounding the blood vessels.
what type of epithelium consists of a single layer of cells that are as tall as they are wide?
simple cuboidal epithelium
what is the function of simple cuboidal epithelium?
absorbs fluids and other substances across its apical membrane and to secrete specific molecules.
what type of epithelium is composed of a single layer of tall narrow cells?
simple columnar epithelium
what are the general functions of simple columnar epithelium?
absorption and secretion of mucin. oocyte movement through uterine tube.
what are the two general types of epithelium composed of a single layer of cells that are taller than wide?
where in the body does the simple ciliated columnar epithelium occur?
lining of uterine tubes and larger bronchioles of respiratory tract.
what type of epithelium is composed of multiple layers with the apical layer being flat?
stratified squamous epithelium
what is the function of stratified squamous epithelium?
to protect underlying tissues from damage due to activities that are abrasive and cause friction
what two general types of stratified squamous epithelium occur?
nonkeratinized stratified squamous epithelium, keratinized stratified squamous epithelium
where does nonkeratinized stratified squamous epithelium occur?
oral cavity, pharynx, esophagus, vagina, anus
what type of epithelium is typically composed of two layers with the apical layer being cube-shaped cells?
stratified cuboidal epithelium
what type of epithelium is composed of two or more layers of cells with the apical layer being made of cells taller than they are wide?
stratified columnar epithelium
where is stratified columnar epithelium found?
the large ducts of salivary glands, the membranous segments of the male urethra
what two types of pseudostratified columnar epithelium occur?
pseudostratified ciliated columnar epithelium, pseudostratified nonciliated columnar epithelium
where is pseudostratified ciliated columnar epithelium found?
respiratory tract, nasal cavity, pharynx, larynx, trachea, bronchi
what is the function of pseudostratified columnar epithelium?
protection, secretion, movement of mucus
what is the function of transitional epithelium?
distention and relaxation to accommodate urine volume changes in bladder, ureters and urethra
glands arise from epithelial tissue invaginating into what type of underlying tissue?
what is the function of a gland?
they perform secretory functions by producing substances either for use elsewhere in the body or for elimination from the body.
what type of tissue supports other tissues both physically and physiologically and also protects and binds other tissues?
what is the extracellular matrix of connective tissue?
a combination of ground substance and protein fibers
list the main functions of connective tissue:
physical protection, support and structural framework, binding of structures, storage, transport, immune protection
connective tissue may be classified into what three broad categories?
connective tissue proper, supporting connective tissue, fluid connective tissue