Reproduction

• The function of the placenta

  • Food and oxygen pass from the mother's blood into the baby's blood
  • Waste products (such as carbon dioxide

  and salts) pass from the baby to the mother
• The umbilical cord carries nutrients to the baby
• head contains nucleus (chromosomes) (genes) (gamete) (DNA)

  has acrosome (penetrates egg)/ fertilises egg

  tail movement
• Events that occurred just before birth,at birth and just after birth

  • The baby is move to the cervix.
  • Amniotic sac breaks
  • ‘The umbilical cord is cut.
  • the mothers breast produces milk
• Days 1 to 5

  The lining of the uterus (which had built up during the previous menstrual cycle) breaks down.

  This lining, along with some blood, is passed out of the body through the vagina. This process is

  called menstruation, or having a period.
• Days 6 to 13

  A new lining develops in the uterus.
• Day 14: The egg is released from the ovary. This is called ovulation. The egg can survive for 2 days in the fallopian tube.
• Days 15 to 28

  The lining of the uterus remains in place.
• The fertile period is the time during the menstrual cycle when a female is most likely to become pregnant if she has sexual intercourse.
• The ovary - produces eggs
• Fallopian tube- fertilisation happens here
• Uterus - baby will develop here
• Vagina - birth canal -A muscular tube that opens to the outside of the body.
• Cervix- the opening /neck of the uterus- sperm passes through here
• The testis (plural testes) makes sperm.
• The scrotum is a sac in which the testes are held.
• Urethra- Allows the passage of either urine or semen.
• Sperm duct- It carries the sperm cells from the testes to the urethra.
• Male reproductive system

  
• penis - sperm passes through here
• reproductive system