Cell Specialisation and Organisation

Question 1

where do cells come from?

Answer 1

all cells in a mature multicellular organism are produced by MITOSIS from the fertilised egg and therefore contain the exact same ALLELES

Question 2

definition of a tissue

Answer 2

a collection of SIMILAR CELLS that preform a SPECIFIC function

Question 3

example of a tissue

Answer 3

epithelial tissue - consists of sheets of cells that line the surface of organs & have a protective/secretory function

Question 4

definition of an organ

Answer 4

a collection of similar cells that preform a major function

Question 5

example of an organ

Answer 5

stomach -
muscle churns and mixes contents
epithelium produces secretions & protects stomach wall
connective tissue holds together other tissue

Question 6

definition of an organ system

Answer 6

a number of organs working together

Question 7

example of an organ system

Answer 7

digestive system

mouth, oesophagus, gallbladder, anus, stomach