chpt 5

Question 1

what is tissue

Answer 1

a group of similar cells and cell products working together

Question 2

what are the 4 types of tissue

Answer 2

epithelial, nervous and muscular

Question 3

what is the matrix composed of?

Answer 3

fibroud tissue and a clear gel substance

Question 4

types of embryonic tissue

Answer 4

ectoderm
endoderm
mesoderm

Question 5

what is the ectoderm layer

Answer 5

the outer layer
gives rise to epidermis and nervous system

Question 6

what is the endoderm layer

Answer 6

the inner layer
gives rise to mucous membrane lining degestive and respiratpry tracts

Question 7

what is the mesoderm layer

Answer 7

the middle layer
gives rise to cartilage, bone and blood

Question 8

what is epithelial tissue

Answer 8

• Epithelia are sheets of closely adhering cells, one or more cells thick
• Covers body surfaces and lines body cavities
• Upper surface usually exposed to the environment or an internal space in the body
• Constitutes most glands
  Avascular (does not have blood vessels)
• Usually nourished by underlying connective tissue

Question 9

simple epithelia vs stratified epithelia

Answer 9

Simple epithelia
Contain one layer of cells
Named by shape of cells
All cells touch basement membrane
Stratified epithelia
Contain more than one layer
Named by shape of apical cells
Some cells rest on top of others and do not touch basement membrane