How do hormone start reproductive function
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Hormones
Hormones are the chemical substances secreted by endocrine glands to regulate many physicochemical functions in the human body. Glands in our body are of two types – Endocrine glands and Exocrine glands.
Gonads or sex glands
Gonads are the sex glands which secrete sex hormones. These sex hormones control the onset of puberty and initiate the reproductive function.
a) Gonads in males
A pair of testes forms the gonads in males. Testes are located in a structure called as scrotum which distends below from abdominal region to maintain low temperature. Low temperature favours the formation of sperms in the testes. Testes also secrete the hormone testosterone.
• Functions of testosterone: Testosterone initiates and controls the changes in males occurring during puberty. These changes are called as secondary sexual characters which include deeper voice, development of penis, facial and body hair. Testosterone also controls the growth and maturation of sperms in males. Testosterone initiates the reproductive function in males.
• Reproductive phase in males: The reproductive phase of life begins at puberty. The reproductive phase of life extends from puberty to 70 years of age.
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Summary
Hormones
Hormones are the chemical substances secreted by endocrine glands to regulate many physicochemical functions in the human body. Glands in our body are of two types – Endocrine glands and Exocrine glands.

Gonads or sex glands
Gonads are the sex glands which secrete sex hormones. These sex hormones control the onset of puberty and initiate the reproductive function.
a) Gonads in males
A pair of testes forms the gonads in males. Testes are located in a structure called as scrotum which distends below from abdominal region to maintain low temperature. Low temperature favours the formation of sperms in the testes. Testes also secrete the hormone testosterone.
• Functions of testosterone: Testosterone initiates and controls the changes in males occurring during puberty. These changes are called as secondary sexual characters which include deeper voice, development of penis, facial and body hair. Testosterone also controls the growth and maturation of sperms in males. Testosterone initiates the reproductive function in males.
• Reproductive phase in males: The reproductive phase of life begins at puberty. The reproductive phase of life extends from puberty to 70 years of age.

b) Gonads in females
A pair of ovaries forms the gonads in female. Ovaries are the female sex organs that lie one on either side of the abdominal cavity. Ovaries produce two hormones, namely, estrogen and progesterone. The reproductive phase of females is marked by the menstrual cycle.
• Functions of female sex hormones:Estrogen controls the changes that occur during puberty, like feminine voice, soft skin and development of mammary glands, growth of pubic hair and controls the release of mature eggs. Progesterone controls the uterine changes during menstrual cycle, and helps in the maintenance of pregnancy.
• Reproductive phase in women: Reproductive phase of life in women starts from puberty and extends till the age of 45. Menarche is the first occurrence of menstruation. Menopause is the stoppage of menstruation. Reproductive phase is marked between menarche and menopause.
• Menstruation: The shedding of the uterine thickening along with its blood vessels at the end of menstrual cycle is called as menstruation. The menstrual cycle takes place every 28-30 days. One ovum is released by either of the ovaries during one menstrual cycle. In the absence of fertilisation, ovum and the thickened uterine walls are disrupted and are shredded off as menstrual flow or bleeding. Bleeding continues for 3 to 8 days. Menstrual cycle involves maturation of ovum, release of ovum, thickening of uterine wall and menstruation.
Hormones are the chemical substances secreted by endocrine glands to regulate many physicochemical functions in the human body. Glands in our body are of two types – Endocrine glands and Exocrine glands.
Gonads or sex glands
Gonads are the sex glands which secrete sex hormones. These sex hormones control the onset of puberty and initiate the reproductive function.
a) Gonads in males
A pair of testes forms the gonads in males. Testes are located in a structure called as scrotum which distends below from abdominal region to maintain low temperature. Low temperature favours the formation of sperms in the testes. Testes also secrete the hormone testosterone.
• Functions of testosterone: Testosterone initiates and controls the changes in males occurring during puberty. These changes are called as secondary sexual characters which include deeper voice, development of penis, facial and body hair. Testosterone also controls the growth and maturation of sperms in males. Testosterone initiates the reproductive function in males.
• Reproductive phase in males: The reproductive phase of life begins at puberty. The reproductive phase of life extends from puberty to 70 years of age.
maryVideosReferences
Summary
Hormones
Hormones are the chemical substances secreted by endocrine glands to regulate many physicochemical functions in the human body. Glands in our body are of two types – Endocrine glands and Exocrine glands.

Gonads or sex glands
Gonads are the sex glands which secrete sex hormones. These sex hormones control the onset of puberty and initiate the reproductive function.
a) Gonads in males
A pair of testes forms the gonads in males. Testes are located in a structure called as scrotum which distends below from abdominal region to maintain low temperature. Low temperature favours the formation of sperms in the testes. Testes also secrete the hormone testosterone.
• Functions of testosterone: Testosterone initiates and controls the changes in males occurring during puberty. These changes are called as secondary sexual characters which include deeper voice, development of penis, facial and body hair. Testosterone also controls the growth and maturation of sperms in males. Testosterone initiates the reproductive function in males.
• Reproductive phase in males: The reproductive phase of life begins at puberty. The reproductive phase of life extends from puberty to 70 years of age.

b) Gonads in females
A pair of ovaries forms the gonads in female. Ovaries are the female sex organs that lie one on either side of the abdominal cavity. Ovaries produce two hormones, namely, estrogen and progesterone. The reproductive phase of females is marked by the menstrual cycle.
• Functions of female sex hormones:Estrogen controls the changes that occur during puberty, like feminine voice, soft skin and development of mammary glands, growth of pubic hair and controls the release of mature eggs. Progesterone controls the uterine changes during menstrual cycle, and helps in the maintenance of pregnancy.
• Reproductive phase in women: Reproductive phase of life in women starts from puberty and extends till the age of 45. Menarche is the first occurrence of menstruation. Menopause is the stoppage of menstruation. Reproductive phase is marked between menarche and menopause.
• Menstruation: The shedding of the uterine thickening along with its blood vessels at the end of menstrual cycle is called as menstruation. The menstrual cycle takes place every 28-30 days. One ovum is released by either of the ovaries during one menstrual cycle. In the absence of fertilisation, ovum and the thickened uterine walls are disrupted and are shredded off as menstrual flow or bleeding. Bleeding continues for 3 to 8 days. Menstrual cycle involves maturation of ovum, release of ovum, thickening of uterine wall and menstruation.
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Explanation:
During PUBERTY, pubic and underarm hair starts to grow and teens go through a growth spurt. When the time comes for changes of puberty to occur, the brain releases gonadotropin-releasing hormone (GnRH), which targets the pituitary gland. ➧ Puberty➫ The stage of life when the body becomes capable of reproduction.
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