Answer:
From fertilization and to the end of the second week.
Explanation:
The development of the fetus is divided into three periods, established by most embryologists: pre-embyonic period, which goes from fertilization to the second week of development, embryonic period, which goes from the third week to the eighth week, and the fetal period, which goes from from the third month until the end of pregnancy.
The pre-embyonic stage begins at fertilization and remains until gastrulation. By the end of the second week the embryo already has the neural tube formed, although it is still open at both ends.
I think it’s 100% sorry if you got it wrong
<span>1. resting metabolic rate
2. body composition
3. creeping obesity
4. metabolic rate
5.metabolism</span>
The two root words for kidney are nephro and rene. Nephro is for nephrosis, and rene is for renal artery.
