This specimen shows the sagittal section of the male pelvis.
The male pelvis consists of organs such as the urinary bladder, the urethra, the prostate, the rectum and the anal canal. Other structures such as the seminal vesicles, the ejaculatory ducts, the terminal parts of the vas deferens, the distal parts of the ureters along with the blood vessels and the nerves are also present within the pelvis.
The urinary bladder is a muscular bag that temporarily stores urine. It is located in the lesser pelvis behind the pubic symphysis. An empty urinary bladder is tetrahedral in shape. The ureters open into the posterior aspect of the urinary bladder. The neck of the urinary bladder is directed downwards and becomes continuous with the urethra at the internal urethral orifice. In males, the prostate gland is situated onto the urethra and the neck of the urinary bladder. In case of benign prostatic hypertrophy, the median lobe of prostate enlarges producing an elevation within the urinary bladder known as uvula vesicae. This uvula vesicae obliterates the internal urethral orifice, thereby making the passage of urine more difficult.
The prostate is a pyramidal fibromuscular gland which surrounds the prostatic urethra from the base of the urinary bladder to the membranous urethra. The gland presents numerous lobes. Within each lobe, there are numerous secretory acini. As age advances, these secretions could get calcified to form the prostatic concretions. In case of benign prostatic hypertrophy, the median lobe of prostate enlarges producing an elevation within the urinary bladder known as uvula vesicae. This uvula vesicae obliterates the internal urethral orifice, thereby making the passage of urine more difficult.
The rectum is the terminal portion of the gastrointestinal tract. In males, it is related to the urinary bladder and the prostate anteriorly and to the sacrum and coccyx posteriorly. It is very prone for hemorrhoids.
The anal canal is the terminal part of the gastrointestinal tract. It is 3.8 centimeters long. The anal canal is more prone for hemorrhoids.