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The '''gonad''' is the organ that makes [[gamete]]s. Gametes are [[haploid]] germ cells. For example, [[spermatozoon|sperm]] and [[ovum|egg]] cells are gametes.
 
The '''gonad''' is the organ that makes [[gamete]]s. Gametes are [[haploid]] germ cells. For example, [[spermatozoon|sperm]] and [[ovum|egg]] cells are gametes.
   
In males, the gonads, known as the testes, secrete the class of hormones called androgens. The predominant androgen in males is testosterone. In females, the gonads, known as the ovaries, secrete estrogen and progesterone. The dominant estrogen is known as estradiol, which is derived from testosterone.
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In males, the gonads, known as the [[testes]], secrete the class of [[hormones]] called [[androgens]]. The predominant androgen in males is [[testosterone]]. In females, the gonads, known as the [[ovaries]], secrete [[estrogen]] and [[progesterone]]. The dominant estrogen is known as [[estradiol]], which is derived from testosterone.
   
The gonads are controlled hormonally by luteinizing hormone (LH) and follicle-stimulating hormone (FSH) secreted by the anterior pituitary gland. The anterior pituitary gland's excretion of LH and FSH are, in turn, controlled by the hypothalamus's gonadotropin-releasing hormone.
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The gonads are controlled hormonally by [[luteinizing hormone]] (LH) and [[follicle-stimulating hormone]] (FSH) secreted by the anterior [[pituitary gland]]. The anterior pituitary gland's excretion of LH and FSH are, in turn, controlled by the hypothalamus's [[gonadotropin-releasing hormone]].
   
Although it can refer to [[testicle]]s or [[ovary|ovaries]] when used in a medical context, the slang use of "gonads" (or "nads") usually only refers to testicles. The usage of such is similar to "balls."
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==Regulation==
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The gonads are controlled hormonally by [[luteinizing hormone]] (LH) and [[follicle-stimulating hormone]] (FSH) secreted by the [[anterior pituitary gland]]. The anterior pituitary gland's excretion of LH and FSH are, in turn, controlled by the [[hypothalamus]]' [[gonadotropin-releasing hormone]].
   
Gonads start developing as a common [[anlage]], and only later are differentiated to male or female [[sex organ]]s. The [[SRY]] [[gene]], located on the [[Y chromosome]] and encoding the [[testis determining factor]], decides the direction of this differentiation.
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==Development==
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{{Main|Development of the gonads}}
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Gonads start developing as a common [[Anlage (biology)|anlage]], in the form of [[gonadal ridge]]s, and only later are differentiated to male or female [[sex organ]]s. The [[SRY]] [[gene]], located on the [[Y chromosome]] and encoding the [[testis determining factor]], decides the direction of this differentiation.
   
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The development of gonads is a part of the [[development of the urinary and reproductive organs]].
   
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==See also==
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* [[Sexual development]]
   
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[[Category:Glands]]
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[[Category:Endocrine system]]
 
[[Category:Reproductive system]]
 
[[Category:Reproductive system]]
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[[Category:Urogenital system]]
   
 
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The gonad is the organ that makes gametes. Gametes are haploid germ cells. For example, sperm and egg cells are gametes.

In males, the gonads, known as the testes, secrete the class of hormones called androgens. The predominant androgen in males is testosterone. In females, the gonads, known as the ovaries, secrete estrogen and progesterone. The dominant estrogen is known as estradiol, which is derived from testosterone.

The gonads are controlled hormonally by luteinizing hormone (LH) and follicle-stimulating hormone (FSH) secreted by the anterior pituitary gland. The anterior pituitary gland's excretion of LH and FSH are, in turn, controlled by the hypothalamus's gonadotropin-releasing hormone.

Regulation

The gonads are controlled hormonally by luteinizing hormone (LH) and follicle-stimulating hormone (FSH) secreted by the anterior pituitary gland. The anterior pituitary gland's excretion of LH and FSH are, in turn, controlled by the hypothalamus' gonadotropin-releasing hormone.

Development

Main article: Development of the gonads

Gonads start developing as a common anlage, in the form of gonadal ridges, and only later are differentiated to male or female sex organs. The SRY gene, located on the Y chromosome and encoding the testis determining factor, decides the direction of this differentiation.

The development of gonads is a part of the development of the urinary and reproductive organs.

See also

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