Daeun Won CHAPTER 3 HISTOLOGY

What is histology?

Study of tissue

What is cell differentiation?

Differentiations is the developmental process that results in the formation of different (specialized) type of cells.

What are the four types of tissue in the body?

Epithelial, connective, nerve, muscle

What are three general characteristics of epithelial tissue?

-they are adhere closely to on another

-no blood vessels (non-vascular)

-a body surface or lining body cavities

What does avascular mean?

non-vascular

What are the three ways epithelial tissue are classified?

Layering of the cells, shape of the cells, cellular modifications

What are simple cells?

single layer of cells

What are stratified cells?

Multiple layers of cells.

How do squamous cells look?

flat

How do cuboidal cells look?

boxy

How do columnar cells look?

tall and skinny

What are the three types of cellular modifications?

cilia, microvilli, musus-secreting

What type of cells do you find cellular modifications on?

usually present only in columnar epithelial cells

What are cilia?

fine motile hairs

What are microvilli?

finger-like extensions of the cells

What are goblet cells?

mucus-secreting columnar cells

Where do you find simple squamous epithelial cells?

lining of all blood vessels

Where do you find simple cuboidal cells found?

the urinary tubules of the kidneys; the liver, pancreas, thyroid, and other glands

What does Aendo/ mean?

gland

Where do you find simple columnar epithelial cells?

lining of a women’s fallopian Tubes

What do cilia on the fallopian tube do?

Push eggs from ovaries to the uterus

Where do you find simple columnar epithelial cells with goblet cells?

lining of intestine

What do goblet cells in the stomach do?

neutralize stomach acid

Where do you find simple columnar brush-border epithelium with goblet cells?

lining of the intestine

Where do you find pseudostratified columnar brush-border epithelium with goblet cells?

lining of respiratory tract

What does pseudo mean?

false

What does pseudostratified mean?

false stratified

What does cilia on the respiratory tract do?

they trap dust

Where do you find transitional epithelium?

urinary bladder

Why is it called transitional epithelium?

becomes stretched as the urinary bladder becomes filled with urine

What does lumen mean?

What are the two subtypes of stratified squamous epithelium?

Non-keratinizing, keratinizing

What is keratin?

hardening protein

Where do you find keratin?

hair, skin, nails

What are non-keratinizing stratified squamous epithelium?

no dead layers of cells

Where do you find non-keratinizing stratified squamous epithelium?

lining of the oral cavity, anal canal, and vaginal canal

What is keratinizing satanizing squamous epithelium?

dead layers of cells present

Where do you find keratinizing stratified squamous epithelium?

Epidermis of the skin

What do all cells need to be surrounded by?

liquid

What is the function of connective tissue

consist of cells and intercellular matter

How are connective tissue classified?

Based on the type of cell or cells, type of intercellular

What is areolar loose connective tissue?

type of connective tissue

What are fibroblasts?