Tissues- basics- Chapter 3

Question 1

tissue

Answer 1

group of similar cells that perform a common function

Question 2

histology

Answer 2

study of tissues

Question 3

blastocyst

Answer 3

beginning of tissues
hollow sphere of cells
formed by repeated cell division that initiated with fertilization

Question 4

embryological germ layers

Answer 4

three layers of blastocyst

Question 5

ectoderm

Answer 5

outside

Question 6

mesoderm

Answer 6

middle

Question 7

endoderm

Answer 7

inside

Question 8

germ layer theory

Answer 8

organs develop from one of three germ layers

layers present in 3 week old embryo

Question 9

ectoderm

Answer 9

first to form
outermost layer
forms skin (epidermis), nervous system, and brain

Question 10

mesoderm

Answer 10

middle layer
forms bones and muscles
forms circulatory, urinary, and reproductive systems

Question 11

endoderm

Answer 11

innermost layer

forms lining of digestive tract and organs

Question 12

stem cells

Answer 12

retain the ability to undergo cell division later
included in all germ layers
assist the body in development
assist in healing the body layer

Question 13

4 types of human tissue

Answer 13

epithelial, connective, muscle, nerve