ch.4 tissues; epithelial

Question 1

what are the 5 main tissue types

Answer 1

-epithelial
-connective
-nervous
-muscle

Question 2

what is the function of epithelial tissue

Answer 2

cover a body surface or lines a body cavity, also forms most of the bodies glands.
-ex. skin, inner linings of hollow organs and cavities and lining of all blood vessels.

Question 3

structure and assembly of epithelial tissue

Answer 3

broad flat sheets of cells that attach tightly, have no holes or gaps, don’t easily separate

Question 4

location of epithelial tissues

Answer 4

occurs at the interface of two environments.

Question 5

simple:

Answer 5

one single cell layer

Question 6

more than one layer of cells

Answer 6

stratified

Question 7

squamous

Answer 7

flat cells

Question 8

cuboidal

Answer 8

cube shaped cells

Question 9

columnal

Answer 9

column like cells

Question 10

glands made from epithelial cells

Answer 10

-endocrine: secrete into the bloodstream
-ex. thyroid, ovaries, testis make hormones
-exocrine glands: ducts
-ex. sweat glands, sebacious glands; sweat, saliva, oil production, liver and pancreas

Question 11

simple squamous
function:
location

Answer 11

function: passage of materials by diffusion and filtration
location: air sacs of lungs and lining of the heart

Question 12

simple cuboidal
function:
location

Answer 12

function: secretion and absorption
location: pancreas and salivary glands
* associate cuboidal with glands

Question 13

simple columnar
function:
location

Answer 13

function: active movement of molecules, absorption, and secretion
structure: thin enough to allow movement yet thick enough to house cellular machinery
ciliated: move substances across body surfaces
location:
-nonciliated: digestive tract and gall bladder
-ciliated: small bronchi and some regions of the uterus.

Question 14

pseudostratified columnar:
function
location

Answer 14

function: secretes mucous, propel mucous with cilia
location: trachea
-has different heights of cells, taller stick out

Question 15

stratified squamous
function
location

Answer 15

function: protect underlying tissues
-nonkeratinized: mucousal lining of oral cavity
-example: esophagus, mouth, vagina
-keratinized: epidermis of the skin
-ex. palm of hand and dorsum of foot.

Question 16

stratified cuboidal
function
location

Answer 16

function: protection
location: largest ducts of sweat glands, mammary glands

Question 17

stratified columnar
function
location

Answer 17

function: protection, secretion
location: male urethra, vas deferens, surface of the eye
-rare

Question 18

transitional epithelium
function
location
structure

Answer 18

function: stretches and allows distension of urinary organ
location: only found in the urinary system
structure: starts as cuboidal, once stretched and filled-squamous