Gametes, Reproductive Systems + Puberty
- Created by: hannahadams
- Created on: 25-05-15 21:07
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- Gametes, Reproductive Systems + Puberty
- male: sperm
- they are specialised cells formed by meiosis, followed by differentiation in the testes under the influence of testosterone
- adapted for their function by having a haploid nucleus and a tail for swimming
- female: ovum, (ova -pl)
- much larger than the male gamete
- one released every 28 days from an ovary during the menstrual cycle
- female reproductive system
- the female gamete - the ovum is produced in the ovaries during development of the foetus in the uterus
- when a girl is born all the ova are present in the ovaries however they are not fully developed or mature yet
- the female sex hormone, oestrogen is produced by the ovaries and stimulates the development of the female secondary sexual characteristics during puberty
- includes role in the release of a mature ovum during the menstrual cycle
- the female gamete - the ovum is produced in the ovaries during development of the foetus in the uterus
- male reproductive system
- the male gamete - the sperm are produce by the testes from the onset of puberty
- the male sex hormone, testosterone, produced by the testes, stimulates sperm production and the development of the male secondary sexual characteristics during puberty
- Puberty
- during puberty sex hormones stimulate changes in the body knows at the secondary sexual characteristics which lead to sexual maturity
- female hormone: oestrogen produced by the ovaries
- the presence of male or female sex organs is known as the primary sexual characteristics
- male hormone: testosterone produced by the testes
- males
- growth of pubic hair
- sexual awareness and 'drive' increases
- growth of muscles
- development of the sexual organs - genitals enlarge
- sperm production starts in the testes
- voice deepens
- females
- development of sexual organs and breasts develop
- menstrual cycle begins in which one ovum is released every 28 days
- development of pelvis and hips - widen
- menstruation begins
- sexual awareness and 'drive' increase
- growth of pubic hair
- male: sperm
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