Copulation & conception.Cambridge IGCSE Biology

Copulation & conception.Cambridge IGCSE Biology

• 1.
  Copulation and conception
• 3.
  Ovulation provides afemale gamete The ovum moves slowly along the oviduct by; 1) Peristalsis – rhythmic contraction of muscles in the oviduct 2) Cilia- hair on the lining of the oviduct sweep the ovum It takes 4-7 days for the ovum to reach the uterus.
• 4.
  Copulation Human copulation isthe act of reproduction in which the male sex organ enters the female sex organ.
• 5.
  • In humancopulation, the highly motile sperms get deposited in the female reproductive tract. • If this process is successful, the sperm will fertilize the egg, thereby forming new offspring. Copulation is also known as sexual intercourse or coitus.
• 6.
  Fertilisation is thefusion of ovum and sperm Fertilisation: fusion of ovum and sperm. Series of changes undergoes for fertilization; 1) The ovum membrane alters to form a barrier to the entry of other sperm 2) The head of the sperm moves toward the nucleus of the ovum and the two fuse 3) Zygote starts to divide
• 7.
  Conception (when the eggis fertilized by the sperm) can take place as soon as three minutes after sex or it may take up to five days. Implantation (when the fertilized egg attaches to the uterine wall) occurs five to 10 days after fertilization—which means it can happen anywhere from five to 15 days after you had sex.