Male Gonads
Male Gonads - Related Videos
10:43
Dissection of Larval Zebrafish Gonadal Tissue
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Cited by 6 •
2017
Here, we present a protocol for isolating gonadal tissue of larval zebrafish, which will facilitate investigations of zebrafish sex differentiation and maintenance.
02:59
C. elegans Gonad Extrusion: A Rapid Dissection Technique
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2023
This video describes a method to dissect gonads from adult C. elegans hermaphrodites, resulting in tissues that are suitable for immunostaining and fluorescent imaging.
03:59
Gonad Microinjection: A Method of Compound Delivery Directly into the Germline of C. elegans
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2023
This video describes microinjection, a common method of creating transgenic C. elegans strains. In the example, we will see microinjection used to introduce a ribonucleoprotein (RNP) complex for CRISPR-bases gene editing.
02:21
Enriching for Males: Maintaining a Stock of Male C. elegans
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2023
Nematodes can be propagated easily in the lab--in part because hermaphrodites can reproduce by self-fertilization. However, genetic crosses and other experiments may require a large number of males. This video describes a method to enrich for male C. elegans.
01:24
Gonadal and Placental Hormones
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2026
The gonads, namely the testes in males and the ovaries in females, are pivotal in producing gonadal hormones that orchestrate the intricate processes of sexual development and reproduction. In males, testosterone is the primary gonadal androgen. It plays a central role in the maturation of male reproductive organs — the penis and testes. Additionally, testosterone is instrumental in the development of secondary sexual characteristics — a deep voice as well as facial and pubic hair growth — and...
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The hypothalamic-pituitary-gonadal axis coordinates testicular activity through hormonal signaling and feedback control. The hypothalamus and pituitary regulate gonadal functions, while feedback helps keep hormone production and reproductive activity coordinated. This integrated organization makes the axis useful for explaining how endocrine regulation connects sexual development with fertility.
Different cell populations divide the work required for male reproductive function. Germ cells in seminiferous tubules undergo spermatogenesis, Sertoli cells support that process, and Leydig cells secrete testosterone when stimulated by luteinizing hormone. Follicle-stimulating hormone also helps regulate sperm production, so fertility depends on coordinated cellular and hormonal roles rather than one component alone.
Distinguishing these hormones clarifies how regulation is distributed within the testes. Luteinizing hormone acts in relation to Leydig-cell testosterone secretion, whereas follicle-stimulating hormone helps regulate sperm production. Examining their separate roles helps researchers interpret endocrine control more precisely and consider whether a reproductive problem involves hormone signaling, sperm formation, or both.
Because gonadal activity is linked to sexual development through the hypothalamic-pituitary-gonadal axis, studying these organs helps connect hormonal signaling with changes associated with puberty. The focus is not limited to sperm production: researchers can also examine testosterone secretion and feedback control to understand how reproductive maturation is coordinated biologically.
Analysis of the testes can connect infertility research to several biological levels: germ-cell development within seminiferous tubules, Sertoli-cell support, Leydig-cell testosterone secretion, and hormonal regulation by luteinizing hormone and follicle-stimulating hormone. Considering these components together helps investigators study possible causes of impaired fertility rather than treating sperm production as an isolated event.
Male gonad research supports contraception studies by providing a biological framework for examining sperm production and its regulation. It also contributes to developmental biology by linking germ-cell activity, hormone secretion, sexual development, and feedback control. These applications extend the topic beyond anatomy, showing how testicular cells and endocrine pathways can be studied as parts of reproductive development.