NEET BIOLOGY

Detailed explanation-1: -During fertilization, the sperm and egg unite in one of the fallopian tubes to form a zygote. Then the zygote travels down the fallopian tube, where it becomes a morula. Once it reaches the uterus, the morula becomes a blastocyst . The blastocyst then burrows into the uterine lining-a process called implantation.

Detailed explanation-2: -If one of the sperm cells penetrates the egg, the egg is fertilized and begins developing. The egg takes several days to travel down the fallopian tube into the uterus. After it is in the uterus, a fertilized egg usually attaches to (implants in) the lining of the uterus (endometrium).

Detailed explanation-3: -About 6 days after fertilization, the blastocyst attaches to the lining of the uterus, usually near the top. This process, called implantation, is completed by day 9 or 10.

Detailed explanation-4: -The muscular canal that goes from the uterus to the outside of the body. During birth, the baby passes through the birth canal. Also called vagina.

Detailed explanation-5: -The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.