16. Reproduction

16.3) Sexual reproduction in plants

16.3) Sexual reproduction in plants   In the flower of most plants there are both stamen (male organs) and carpels (female organs), this is a condition known as bisexual or hermaphrodite. Some plants have unisexual flowers.   Insect-pollinated flowers:...

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16.5) Sex hormones in humans

16.5) Sex hormones in humans   Puberty: Puberty is the stage in life when a child's body develops into an adult's body. The changes take place gradually, usually between the ages of 10 and 16. Changes occur at puberty because of hormones: testosterone - produced...

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16.7) Sexually transmitted infections (STIs)

16.7) Sexually transmitted infections (STIs)   Sexually transmitted infection is an infection that is transmitted via body fluids through sexual contact.   AIDS and HIV: Acquired immune deficiency syndrome. ( A ‘syndrome’ is a pattern of symptoms associated...

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16.6) Methods of birth control in humans

  16.6) Methods of birth control in humans   Birth control is controlling the number of children and the time to have them. A couple may use birth control if they are not ready to have a baby yet. There are several types and methods of birth control. Types...

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16.2) Sexual reproduction

16.2) Sexual reproduction   Sexual reproduction: is a process involving the fusion of two gametes (sex cells) to form a zygote and the production of offspring that are genetically different from each other.   Fertilisation: is the fusion of gamete nuclei....

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16.1) Asexual reproduction

16.1) Asexual reproduction   Asexual reproduction: is the process resulting in the production of genetically identical offspring from one parent.   Bacteria: Bacteria are tiny single-celled organisms. They reproduce by a process called binary fission. In...

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16.4) Sexual reproduction in humans

16.4) Sexual reproduction in humans   Male reproductive system: Testes: It is a male gland which produces sperms and the male sex hormone testosterone Scrotum: it is the sac which contains the testicles Sperm Ducts: They are two muscular tubes, each connected to...

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