Types of erros in organ morphogenesis

Question 1

Agenesis

Answer 1

Absent organ due to absent primordial tissue

Question 2

Aplasia

Answer 2

Absent organ DESPITE primordial tissue

Question 3

Deformation

Answer 3

Extrinsic disruption;

occurs after the embryonic period

Question 4

Hypoplasia

Answer 4

Incomplete organ development;

primordial tissue present

Question 5

Malformation

Answer 5

Intrinsic disruption;

occurs during the embryonic period (wk 3-8)

Question 6

Teratogen: most important during

Answer 6

Most susceptible in 3rd-8weks
(embryonic period-organogenesis)

Before week 3: all or non effect
After week 8: growth and function affected