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The epididymis (/ ɛ p ɪ ˈ d ɪ d ɪ m ɪ s /; pl.: epididymides / ɛ p ɪ d ɪ ˈ d ɪ m ə d iː z / or / ɛ p ɪ ˈ d ɪ d ə m ɪ d iː z /) is an elongated tubular genital organ attached to the posterior side of each one of the two male reproductive glands, the testicles.
In a male embryo, the testicular cords will induce the development of the Wolffian duct into the vas deferens, epididymis and the seminal vesicle and cause the repression and regression of the Mullerian duct. [4] The other male sex organs (ex. the prostate) as well as external genitalia are also formed under the influence of testosterone. [4]
As a result of the epididymis being attached to the testis, and the cauda epididymis extending below the lower extremity of the testis (Figure 1C), it was proposed that the epididymis was the prime mover in the evolution of testicular decent, whereby the cauda epididymis preceded the testis into a scrotal location. [1]
The epididymis is a long whitish mass of tightly coiled tube. The sperm that are produced in the seminiferous tubules flow into the epididymis. During passage via the epididymis, the sperm undergo maturation and are concentrated by the action of ion channels located on the apical membrane of the epididymis. [2]
The function of the blood–testis barrier may be to prevent an auto-immune reaction. [13] Mature sperm (and their antigens) emerge significantly after immune tolerance is set in infancy. [13] Since sperm are antigenically different from self-tissue, a male animal can react immunologically to his own sperm. The male can make antibodies against ...
The sex organs of the green algae Chara are the male antheridia (red) and female archegonia (brown). A sex organ, also known as a reproductive organ, is a part of an organism that is involved in sexual reproduction.
The Wolffian duct forms the epididymis, vas deferens, ejaculatory duct, and seminal vesicle in the male reproductive system, but essentially disappears in the female reproductive system. [9] The reverse is true for the Müllerian duct, as it essentially disappears in the male reproductive system and forms the fallopian tubes, uterus, and vagina ...
The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction.Many non-living substances such as fluids, hormones, and pheromones are also important accessories to the reproductive system. [1]