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Disadvantages of sexual reproduction



SECONDARY SEXUAL CHARACTERISTICS What are secondary sexual characteristics? Male Sexual Characteristics Testerone is the main androgen that stimulates the development of secondary sexual characteristics. Broadening of the shoulders. Deepening of the voice due to enlargement of larynx. Hair at the pubic area, armpit and chin regions. Penis and testis enlarge and produce sperms. Body becomes more masculine. Female Enlargement of mammary glands. Hair grows around pubic and armpit regions. Widening of the hips. Ovaries mature and start producing ova. Menstruation starts. Oestrogen triggers the onset of secondary sexual characteristics.   Menstrual Cycle This is characterized by discharge of blood and tissue debris (menses) from the uterus every 28 days. This is due to the breakdown of the endometrium which occurs when the level of progesterone falls and the girl starts to menstruate. The follicle stimulating hormone (FSH) causes the Graafian follicle to develop and also stimulate the ovary to release… Read More »SECONDARY SEXUAL CHARACTERISTICS

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