sexual reproduction

A Zimbabwean family ZIMSEC O Level Combined Science Notes: Reproduction in Humans

• Human being produce sexually
• The process involves the fusion (joining) of the nuclei (sex cells) of the male gamete (sperm)
• and the female gamete (ovum)
• To form a zygote
• The human and female sexual organs take […]
  

Image credit raanetwork.org ZIMSEC O Level Combined Science Notes: Male Reproductive system

• The diagram below shows the reproductive system of a man

Male reproductive system. Image credit goldiesroom.org

• Testes-this is where sperms are made.
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Image credit huffpost.com ZIMSEC O Level Combined Science Notes: Female Reproductive system

• The diagram below shows the reproductive system of a female

Female reproductive system

• Ovaries-there are two ovaries
  • Their function is to produce and release ova […]
    

Image credit lifestylechallenge.deborahgabriel.com ZIMSEC O Level Combined Science Notes: The menstrual cycle

• The reproductive cycle in females is called the menstrual/estrus cycle
• It has an average of 28 days
• It varies from individual to individual but it follows a set pattern
• The cycle is regulated by hormones produced […]
  

There are several major methods of contraception. Image credit relationshipplaybook.com ZIMSEC O Level Combined Science Notes:Contraception:Ways to prevent pregnancy

• Contraception-the deliberate use of artificial methods or other techniques to prevent pregnancy as a consequence of sexual intercourse
• Common methods of contraception […]