Histology: Epithelium

it form glands and lines the outside and inside of the body

Epithelium +

forms Glandular Tissue like liver and pancreas

Epithelium =

It Lines the lumen of tubular organs like stomach and intestine

Epithelium _

It lines the inside body cavities such as mediastinum, retroperitoneal cavity, and thoracic cavity

Epithelium -

It externally covers the body by forming skin and internally covers the organs such as heart and lungs

Epthelium )

Epithelial Cells are anchored to what?

basement membrane

2 surfaces of epithelial tissues

apical and basal

Epithelial Cells are avascular because?

No ExtraCellular Matrix

underneath the epithelial cells are?

Loose Connective Tissue

Loose Connective Tissues contain what to provide nutrients and gas exchange for the epithelial tissues

Capillaries

one layer, flat - scale like cells

simple squamous epithelium +

fx: diffusion, filtration, lubrication

simple squamous epithelium =

Alveoli, Renal Glomerulus, Serous Membranes, Lymphatics

simple squamous epithelium _

one layer, cuboidal, and oval shaped cells

simple cuboidal epithelium +

fx: secretion and absorption

simple cuboidal epithelium =

Proximal Convoluted Tubule, Distal Convoluted Tubule, Sweat Glands, Choroid Plexus

simple cuboidal epithelium _

one layer, tall thin cells, and narrow nuclei cells

simple columnar epithelium +

fx: absorption and secretion (some have cells)

simple columnar epithelium =

Location: GI Tract (Stomach - Anus), small and large intestine, airgways, glands, uterus/uterine tube

Simple Columnar Epithelium _

more than one layer of cells, stratified at apical surface, some cells has keratin but contain no nuclei at Apical surface and other type of this epithelium has nuclei on apical surface

stratified squamous epithelium +

fx: protects underlying tissue from abrasion because some cells have keratin

stratified squamous epithelium =

Location: Epidermis (keratinized), Esophagus/Vagina (non-keratinized)

stratified squamous epithelium _

type of stratified squamous epithelium where cells at the bottom is cuboidal but gets keratinized and squamous as they get to apical surface but contain no nuclei

stratified squamous keratinized epithelium

more than one layer of epithelial cells, has dome shaped cells at apical surface

Transitional Epithelium

fx: stretches and permits distension of urinary organs

Transitional Epithelium =

Location: ureter, bladder, proximal urethra

Transitional Epithelium _

bonus: distal urethra is composed of what?

Stratified Squamous Non Keratinized Epithelium

single layer of cells of differing heights that looks like stratified but all cells are attached to basement membrane, and contain various types of mucus secreting cells, and tall thin cells that conatins cilia

pseudo-stratified ciliated columnar epithelium +

fx: secretion (mainly mucus), propulsion of mucous by cilia

pseudo-stratified ciliated columnar epithelium =

Location: Trachea, bronchi, epididymis, nasal cavity

pseudo-stratified ciliated columnar epithelium _

located on apical surface of anchored cells

cilia +

moves liquid over the surface of some type of columnar cells

cilia =

also located on apical surface of anchored cells that increases surface area for absorption

microvilli +