Renal System Histology and Models

Renal system in cat: Kidney Ureter Urinary bladder

Kidney Ureter

Kidney Ureter Urinary bladder

Ureters Urinary Bladder

Rugae inside urinary bladder that was cut open

Spleen Adrenal gland Kidney Renal artery Ureter Urinary bladder

Adrenal gland Kidney Ureter Urinary bladder Prostate gland Urethra

vasa recta peritubular capillaries

vasa recta peritubular capillaries

Kidney Regions The kidney is divided into three REGIONS. If the question asks you to name the REGION, the answer is one of the below: CORTEX MEDULLA RENAL PELVIS

REGIONS Cortex Medulla Renal Pelvis

Kidney Structures If the question asks you to name the STRUCTURE, it is one of the below:   Within the cortex, you will find the glomeruli and the proximal and distal convoluted tubules. Within the medulla you will find the loops of Henle, collecting tubules, the pyramids and the columns (pale area between the pyramids). Within the renal pelvis you will find the hilus, which branches into the major calyxes, which branch into the minor calyxes.

On this model you need to know the regions, vessels, and the following structures: Pyramids Hilus Ureter Major calyx Minor calyx

Hilus Major calyx Minor calyx Ureter

Renal artery Segmental artery Interlobar artery Interlobular artery Arcuate artery

Interlobar artery Interlobular artery Arcuate artery

REGIONS Cortex Medulla Renal pelvis

STRUCTURES Pyramids Major calyx Minor calyx Hilus Ureter

VESSELS Interlobular artery Arcuate artery Interlobar artery Segmental artery Renal artery

KIDNEY MODEL Glomerulus Proximal convoluted tubule Descending loop of the nephron Thick segment Thin segment Ascending loop of the nephron Distal convoluted tubule Collecting tubule (where urine is most similar to the bladder) Vasa recta

Glomerulus Vasa recta

Distal convoluted tubule Proximal convoluted tubule Glomerulus Descending loop of the Nephron Ascending loop of the nephron Collecting tubule (where the fluid is most similar to urine found in the bladder)

Study Tip: To get oriented, always start at the glomerulus and run your finger down the proximal convoluted tubule. When it loops back up and thickens, you are now at the distal convoluted tubule. Thick segment of the ascending loop of the nephron Thick segment of the descending loop of the nephron Thin segment of the ascending loop of the nephron Thin segment of the descending loop of the nephron

GLOMERULUS Efferent arteriole Afferent arteriole Glomerular capsule The glomerular space is where urine is most dissimilar to the urine in the bladder

KIDNEY SLIDES Glomerulus Kidney tubules (simple cuboidal epithelium)

Glomerulus Tubule Skip

Tubule Glomerulus

Kidney Tubule Glomerulus

Pancreas: don’t get this confused with a glomerulus in the kidney!

Pancreas Kidney