Which development related to the integumentary system is correct?
A) Very fine hairs called lanugo appear at 12 weeks of gestation.
B) Eyelashes, eyebrows, and scalp hair appear at 28 weeks of gestation.
C) Fingernails and toenails develop at 28 weeks of gestation.
D) By 32 weeks, scalp hair becomes apparent.

Question

Quizplus · Accepted Answer

Very fine hairs,called lanugo appear first at 12 weeks of gestational age on the fetus' eyebrows and upper lip.By 20 weeks of gestation,lanugo covers the entire body.By 20 weeks of gestation the eyelashes,eyebrows,and scalp hair also begin to grow.By 28 weeks of gestation,the scalp hair is longer than these fine hairs,which is thin and may disappear by term.Fingernails and toenails develop from thickened epidermis,beginning during the 10th week.Fingernails reach the fingertips at 32 weeks of gestation,and the toenails reach the toe tips at 36 weeks of gestation.

Which Development Related to the Integumentary System Is Correct