Explain the cycle of producing and releasing mature ova
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Solution
In
humans a set of two ovaries is present and they are both functional. They are
mainly involved in gamete formation and hormone secretion. Normally, ovaries
produce one ovum per month or per menstrual cycle. They are involved in the
secretion of secrete estrogen, testosterone, inhibin, and progesterone. These
hormones are responsible for secondary sexual characteristics in females and
for the maturation and maintenance of the female reproductive organs. The menstrual
cycle is the periodic process of ovulation in female primates that also
involves menstruation. It is a cyclic process and is divided into four phases-
the follicular phase, the ovulatory phase, the luteal phase, and the menstrual
phase. It is this cycle that makes pregnancy in females possible. Oogenesis is
the process of development and maturation of an ovum. This process begins while
the female is an embryo herself. During the embryonic growth, the ova undergoes
mitosis to become a primordial follicle that is arrested at prophase I. On
reaching puberty one of these ova gets releases as a primary follicle from the
ovary each month.