40. hypertrophy
Increase in size of organ
or tissue due to increase in
cells size
hyperplasia
Increase in size of organ
or tissue due to increase in
cell numbers
41. atrophy A decrease in size of organ or
tissue after it has reached its
full development due to
reduction in cells size or
number or both
aplasia Complete failure of organ
development due to
reduction in cells number
42. hypoplasia Failure of an organ to reach
its full-sized development
due to reduction in cells
number
neoplasia Abnormal (pathological)
new growth due to
multiplication of the cells in
one tissue or organ