Answer:
1) External and Internal Fertilization. External and internal fertilization are forms of reproduction that vary in method and embryo development.
2) During fertilization, a male gamete (sperm/spermatozoa) fuses with female gamete (egg/oocyte). ... Gametes are reproductive cells that unite during sexual reproduction to form a new cell called a
zygote.
3) The fertilized egg (zygote) divides repeatedly as it moves down the fallopian tube to the uterus. First, the zygote becomes a solid ball of cells. Then it becomes a hollow ball of cells called a blastocyst.
4) These sex cells are also called reproductive cells or gametes. Sperm cells are produced in men's testicles and egg cells are produced in women's ovaries. Sex cells are different from other cells in one special way: Put simply, they only have one half of the total amount of human genetic information.
5) 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.
6) Testicles (testes
The testes are responsible for making testosterone, the primary male sex hormone, and for producing sperm. Within the testes are coiled masses of tubes called seminiferous tubules. These tubules are responsible for producing the sperm cells through a process called spermatogenesis.
