GENERAL HISTOLOGY

Detailed explanation-1: -The internal urethral sphincter regulates involuntary control of urine flow from the bladder to the urethra, and the external urethral sphincter provides voluntary control of urine flow from the bladder to the urethra.

Detailed explanation-2: -The urine flows from the kidneys through the ureters to the bladder. The urine is stored in the bladder until it leaves the body through the urethra.

Detailed explanation-3: -Trigone. The trigone is a triangular muscular structure located between the bladder and urethra. Effective connection between the ureters and the trigone are vital for proper functioning of the ureteral valve mechanism.

Detailed explanation-4: -An outer layer of smooth muscle called the detrusor muscle surrounds the bladder. When your bladder is full, the muscles in the bladder wall can be tightened to squeeze out the urine. As you urinate, the bladder shrinks in size. The bladder wall is made of many layers, including: Urothelium or transitional epithelium.

Detailed explanation-5: -Urethra-narrow tube that passes through the penis and carries urine from the bladder to the outside.