HISTOLOGY
URINARY SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
when ascending of permanent kidneys is completed?
|
|
by the 9th week
|
|
|
by the 5th week
|
|
|
by the 4th week
|
|
|
by the 6th week
|
Explanation:
Detailed explanation-1: -The metanephros remains as the permanent adult kidney. It develops from the uteric bud, an outgrowth of the mesonephric duct, and the metanephric mesoderm, derived from the caudal part of the nephrogenic ridge. Urine excreted into the amniotic cavity by the fetus forms a major component of the amniotic fluid.
Detailed explanation-2: -Prematurity effects on renal development As discussed above, new nephrons form at an exponential rate between 20 and 28 weeks of gestation. Nephron formation ceases between 28 and 36 weeks. Thus, in addition to low birth weight, premature infants born before 36 weeks may not have completed nephron development.
There is 1 question to complete.