Question

How reproduction happens between humans.

Answer 1

Reproduction is a process in which two gametes of opposite gender or sex mate and produce recombinant offspring. Reproduction can be sexual and asexual, reproduction helps in increasing the diversity within the species and make them more compatible with nature. Reproduction ensures continuity of the species for the ages.

Complete answer:
- The male gamete is known as sperm and the female gamete is known as egg, male gamete remains in the scrotum placed outside the body, and the female gamete egg resides in ovaries inside the body.
- When a person hits puberty its hormones level becomes active and a certain large amount of hormones are secreted in the body which prepares the body for reproduction to take place.
- When mating among male and female is done, the sperm formed from the meiosis and mitosis division undergo in the uterus in search of an egg.
- Egg present in the uterus or the fallopian tube sends a signal to the sperm, it is a kind of chemical name fertilizin on egg and antifertilizin on sperm head, when they reach out and recognize the chemical signal, fertilizin guides the path to sperm for fusion.
- After the sperm get fused into the egg cell they form a zygote.
- Zygote with help of fimbriae gets attached to the uterine wall and rests there for further development.
- After the cell division stage of 8, the cell stage occurs zygote is transformed to embryo where the differentiation and development of organs such as eye, limbs, heats take place.
- After 9 months of gastrulation time, the developed child is taken out from the womb with the help of oxytocin which helps in contractile movements.

Note: LH, FSH, testosterone helps in male form the formation of gamete, and estrogen and progesterone help in the development of the uterine wall and matured egg, their hypo and hypersecretion can cause some complications in the body and major disease also. Antifertilizin and fertilizin compatibility make assurance for non-cross-breeding occurring in the organism.