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Secretion of lubricant).FERTILISATION IN HUMAN BEINGSIn human beings, fertilisation is internal. Millionsof sperms are introduced into the vagina of afemale through penis during mating. The processof releasing sperms into vagina is calledejaculation. The sperms are highly active andmotile. They reach the fallopian tubes through theuterus. One of the sperm fuses with the ovum (oregg cell) in the fallopian tube to form a zygote [Fig.9.8 (a)). After fertilisation, a covering is formed |
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