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Testis- is primary male sex glands producing sperms and testosterone hormone.
Scrotal sacs- are specialized skin folds which accommodates testes.
Seminiferous tubule- is structural unit of testes involved in sperm production.
Leydig's cells- are interstitial cells of testes producing testosterone hormone.
Puberty- is age at which gonads starts producing gonadal hormones.
Sexual maturity- is age which gonads start producing respective sex gametes.
Testosterone- male sex hormone released from Leydig's cells of testes.
Gonadotropins- are follicle stimulating hormone (FSH) and leutinizing hormones(LH) from anterior pituitary and acts on ovaries and testes.
Semen- is a secretion of male genital tract which is composed of spermatozoa (male sex cells) and seminal plasma (secretion of accessory glands).
Accessory glands: are secretory glands attached to male genital plasma. These are seminal vesicles, prostate and bulbouretheral glands.
Penis: is copulatory organ of male through which semen is deposited into female reproductive tract.
Sperm: also called spermatozoon (pleural spermatozoa) is haploid male sex cell participating in fertilization.
Seminiferous tubule: are structural unit of testes wherein spermatozoa are produced from spermatogonia cells. These are radially arranged fine tubules that are greatly coiled over each other.
Meiosis: is reductional cell division resulting in production of haploid sex gametes in ovaries and testes.
Semen: is thick whitish fluid like secretion of male genital tract. After centrifugation it separates into seminal plasma and sperms.
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