Base of the bladder that leads into the urethra.
Area of the bladder where the bladder joins the urethra. This area contains the internal sphincter and is a thick layer of muscle fibres.
region of the bladder connecting the main body of the bladder to the urethra.
Junction between urethra and bladder.
Area where the bladder opens into the urethra. Acting on signals from the brain, the bladder-neck muscles either can tighten to hold urine in the bladder or can relax to allow urine out.
This can be found at the base of the bladder, urine exits from here into the urethra.
The area of the bladder where the bladder muscle converges to form the urethra.
The junction of the bladder and the urethra
The place where the urethra and bladder connect.
Area of thickened muscle fiber where the bladder joins the urethra. Acting on signals from the brain, bladder neck muscles can either tighten to hold urine in the bladder or relax to allow urine out and into the urethra. These muscles also tighten during ejaculation to prevent backflow of semen into the bladder.