NEET BIOLOGY

Detailed explanation-1: -The reproductive events in humans include formation of gametes (gametogenesis), i.e., sperms in males and ovum in females, transfer of sperms into the female genital tract (insemination) and fusion of male and female gametes (fertilisation) leading to formation of zygote.

Detailed explanation-2: -Fertilization happens when a sperm cell successfully meets an egg cell in the fallopian tube. Once fertilization takes place, this newly fertilized cell is called a zygote. From here, the zygote will move down the fallopian tube and into the uterus. The zygote then burrows into the uterus lining.

Detailed explanation-3: -Sperm live outside the body for different lengths of time, depending on the environment in which they were released. Unless they are deposited into a female reproductive tract, sperm cells are easily damaged and can only survive a few seconds to a few minutes outside of the body.

Detailed explanation-4: -When sperms come in contact with an egg, one of the sperms may fuse with the egg. Such fusion of the egg and the sperm is called fertilization. During fertilization, the nuclei of the sperm and the egg fuse to form a single nucleus. This results in the formation of a fertilized egg or zygote.

Detailed explanation-5: -If semen gets in your vagina, sperm cells can swim up through the cervix. The sperm and uterus work together to move the sperm towards the fallopian tubes. If an egg is moving through your fallopian tubes at the same time, the sperm and egg can join together.