• REPRODUCTIVE SYSTEMS IN MAMMALS
    BIOLOGY

    REPRODUCTIVE SYSTEMS IN MAMMALS

    Mammals are biparental in reproduction that is sexual reproduction involves two distinct and separate individuals, sexually mature male and female.   A) Male reproductive system The male reproductive system in man consists of testes (singular = testis),…

  • EXCRETION IN MAMMALS
    BIOLOGY

    EXCRETION IN MAMMALS

    There are four types of excretory organs used by mammals. These are: lungs, skin, liver and kidneys. The lungs excrete water vapour and carbon dioxide, the liver excretes bile pigments called bilirubin (derived from the decomposition of…

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