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Question
Given above is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled A, B, C, D respectively.
Given above is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled A, B, C, D respectively.
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Solution
The correct option is B Vas deferens, Seminal vesicle, Prostate, Bulbourethral gland
Sperm cells leave the seminiferous tubules of each testis and pass into a larger coiled tube, the epididymis. There, sperm finish maturing and are stored. During ejaculation, sperm passes from each epididymis into a sperm duct, the vas deferens. The vas deferens extends from the scrotum through the inguinal canal and into the pelvic cavity. Each vas deferens empties into a short ejaculatory duct, which passes through the prostate gland and then opens into the single urethra. The urethra, which at different times conducts urine and semen, passes through the penis to the outside of the body.Thus, the sperm pass through the following structures:
Seminiferous tubules --> epididymis --> vas deferens -->ejaculatory duct --> urethra --> release from body
As sperms travel through the conducting tubes, they mix with secretions from three types of accessory glands. Semen consists of about 200 million sperm cells suspended in the secretions of these glands. The paired seminal vesicles secrete a fluid rich in fructose and prostaglandins into the vasa deferentia. The fructose provides energy for the sperm after they are ejaculated. Prostaglandins stimulate contractions of the uterus, which help move sperm up the female reproductive tract. The single prostate gland secretes an alkaline fluid containing calcium, citric acid,and enzymes. The prostatic fluid may be important in neutralizing the acidic environment of the vagina and in increasing sperm cell motility. During sexual arousal, the paired bulbourethral glands, located on each side of the urethra, release a mucous secretion.
Sperm cells leave the seminiferous tubules of each testis and pass into a larger coiled tube, the epididymis. There, sperm finish maturing and are stored. During ejaculation, sperm passes from each epididymis into a sperm duct, the vas deferens. The vas deferens extends from the scrotum through the inguinal canal and into the pelvic cavity. Each vas deferens empties into a short ejaculatory duct, which passes through the prostate gland and then opens into the single urethra. The urethra, which at different times conducts urine and semen, passes through the penis to the outside of the body.
Thus, the sperm pass through the following structures:
Seminiferous tubules --> epididymis --> vas deferens -->ejaculatory duct --> urethra --> release from body
As sperms travel through the conducting tubes, they mix with secretions from three types of accessory glands. Semen consists of about 200 million sperm cells suspended in the secretions of these glands. The paired seminal vesicles secrete a fluid rich in fructose and prostaglandins into the vasa deferentia. The fructose provides energy for the sperm after they are ejaculated. Prostaglandins stimulate contractions of the uterus, which help move sperm up the female reproductive tract. The single prostate gland secretes an alkaline fluid containing calcium, citric acid,and enzymes. The prostatic fluid may be important in neutralizing the acidic environment of the vagina and in increasing sperm cell motility. During sexual arousal, the paired bulbourethral glands, located on each side of the urethra, release a mucous secretion.
Seminiferous tubules --> epididymis --> vas deferens -->ejaculatory duct --> urethra --> release from body
As sperms travel through the conducting tubes, they mix with secretions from three types of accessory glands. Semen consists of about 200 million sperm cells suspended in the secretions of these glands. The paired seminal vesicles secrete a fluid rich in fructose and prostaglandins into the vasa deferentia. The fructose provides energy for the sperm after they are ejaculated. Prostaglandins stimulate contractions of the uterus, which help move sperm up the female reproductive tract. The single prostate gland secretes an alkaline fluid containing calcium, citric acid,and enzymes. The prostatic fluid may be important in neutralizing the acidic environment of the vagina and in increasing sperm cell motility. During sexual arousal, the paired bulbourethral glands, located on each side of the urethra, release a mucous secretion.
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