4 types of tissue- epithelial, muscle,connective, nervous tissue

Histologist- Study of Tissues

Pathologist-studies the diseases of cells and tissues

Cellularity-more cells than matrix

Tissue-group of similar cells that together carry out a specific job

Junctions-anchor cells together so it can remain in a continuous sheet

Basement Membrane- bottom of epithelial tissue that has glycoproteins and reticular fibers

Microvilli- increases surface area for absorption

Avascular- no blood vessels

Cilia- Sweepers and cleaners

Simple Squamous- Diffusion,filtration,slick/Lungs, heart, blood vessel, kidneys

Simple Cuboidal- One layer, secretes, glands

Endocrine Glands- secretes hormones directly into blood

Exocrine Glands- products are carried by a duct to a hollow organ (digestive enzymes) or out of body (sweat)

Simple Columnar w/ microvilli-absorption of nutrients, intestines

Simple Columnar w/ cilia- sweeps eggs, Fallopian (uterine) tube

Pseudostratified Columnar- secretes mucus, sweeps out debris, upper respiratory tract (trachea, bronchi, bronchioles)

goblet cells- single cell gland that secrete mucus

Stratified Epithelium-more than one layer, classified by top layer

Stratified Squamous-takes friction, is a barrier, protects from fluid loss/Esophagus,skin,mouth

Connective Tissue-Type of tissue that stratified squamous sits on top of

Mitotic Cells-Cells in the stratified squamous tissue that regenerate (mitosis)

Melanocytes-make and release melanin

melanin-skin,eye, and hair pigment

Keratin- waterproof protective top layer of skin

Stratified Cuboidal-layered, secretes, glands

Desquamification-Friction causing top layer of stratified squamous cells to fall off

Transitional Epithelium-stretch to squamous shape (full) to cuboidal (empty)

Stratified Columnar-protection, surrounds sphincter muscles, at end of stomach