Urinary System (Histo Lec)

Renal cortex, renal medulla

Parts of kidney

Renal cortex

Has many round corpuscles and tubule cross sections

Renal medulla

Renal pyramids and renal columns

Renal corpuscles

Found in the renal cortex

Filters blood plasma

Function of renal corpuscle

Glomerulus, bowman’s capsule

What the renal corpuscle is made of.

PCT, loop of henle, DCT

Parts of renal tubules

Proximal convoluted tubule

Brush border (microvilli) for reabsorption

Simple cuboidal epithelium

Lines the PCT

Thin and thick segment

Parts of loop of henle

Simple squamous

Lines the thin segment of loop of henle

Cuboidal

Lines the thick segment of loop of henle

Distal convoluted tubule 

Secretion and fine-tuning of ions

Simple cuboidal, no brush border

Lines the DCT

Renal pyramids and renal columns

Found in the renal medulla

Renal pyramids

Cone-shaped structures that contain the loop of henle and collecting ducts.

Renal papilla

Apex of the renal pyramid

Minor calyx

Where the renal papilla drains urine to

Renal column

Extensions of cortical tissue between pyramids that support and separate the pyramids.

Blood vessels and interlobar arteries/veins

What does the renal columns contain?

Ureter

Carries urine from kidneys to bladder

Transitional epithelium (urothelium)

Mucosa of ureter

Smooth muscle (inner longitudinal, outer circular)

Muscularis of ureter

Connective tissue

Adventitia of ureter

Urinary bladder

Stores urine temporarily

Transition epithelium

Lines the urinary bladder

Detrusor muscle

The urinary bladder is a thick muscular wall that contracts to empty the bladder

Rugae

What folds on the urinary bladder when empty?

Urethra

Conducts urine outside the body

Transitional epithelium

Lining of urethra near the bladder

Stratified columnar or squamous

Lining of urethra near the opening

Renal corpuscle

Containing a tuft of glomerular capillaries surrounded by a double-walled glomerular capsule.

Bowman’s capsule

Double-walled epithelial capsule

Glomerulus

Responsible for the filtration of blood and formation of urine

Stratified urothelium or transitional epithelium

The mucosa of ureter, urinary bladder, and urethra

Thick muscularis of ureters

Moves urine towards the bladder