Histology Guide

virtual histology laboratory

Chapter 16 - Urinary System

The urinary system (also known as the renal system) consists of the kidneys, ureters, bladder and the urethra. Its functions in the formation of urine and regulation pressure, volume and blood pH.


The kidney filters blood, removes waste materials and concentrates the filtrate (urine) for elimination. Each kidney contains millions of functional units called nephrons.

MH 143 Kidney


Kidney - Nephron

MH 141a Kidney

MH 141b Kidney

Kidney - Connective Tissue

MH 142 Kidney

Kidney Fetal

MH 140 Kidney Fetal


The ureter is a fibromuscular tube through which the urine passes from the kidney to the bladder.

MH 146 Ureter

(longitudinal and cross sections)

MHS 215 Ureter

(longitudinal and cross sections)


The urinary bladder is a muscular sac that stores urine, allowing urination to be infrequent and voluntary.

MH 147 Bladder

MH 018 Transitional Epithelia

(relaxed and stretched bladder)