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URINARYBIO 312
URINARY FUNCTIONS
‣ There are three major functions of the urinary system:
1. Filtration 2. Absorption 3. Secretion
RENAL ANATOMY
Renal Artery
Renal Pelvis
Renal Pyramid
Renal Column
Renal Sinus
Renal Cortex
Renal Capsule
Renal Vein
Ureter
Major Calyx
Minor Calyx
Hilum
RENAL VASCULATURE
Renal Artery
Segmental Arteries
Lobar Arteries
Interlobar Arteries
Arcuate Arteries
Interlobular Arteries
Glomerulus
Efferent Arteriole
Afferent Arteriole
Interlobular Veins
Peritubular Capillaries
Arcuate VeinsInterlobar Veins
Lobar Veins
Segmented Veins
Renal Vein
NEPHRON ANATOMY
Glomerulus
Collecting DuctAfferent Arteriole
Bowman's Capsule
Proximal Convoluted Tubule
Descending Limb
Loop of Henle
Ascending Limb
Distal Convoluted TubuleEfferent Arteriole
ANATOMY OF BOWMAN'S CAPSULE
} Urinary Pole{Vascular Pole
Parietal Layer (Simple Squamous)
Visceral Layer
ANATOMY OF GLOMERULUS
Glomerulus- Fenestrated capillaries within the Bowman's Capsule. Site of Filtration.
Podocytes- Cell body's with primary and secondary processes known as pediciels. From filtration slits.
Afferent Arteriole
Efferent Arteriole
Vascular Endothelium
Podocyte
Pediciels of PodocytesPediciels of Podocytes
Parietal Layer of Bowman's Capsule
Visceral Layer of Bowman's Capsule (Podocytes)
Urinary Space
PROXIMAL CONVOLUTED TUBULE
‣ Cuboidal Cells; low concentration of columnar epithelium
‣ Lined with microvilli known as brush border
Proximal Convoluted Tubule
DISTAL CONVOLUTED TUBULE
‣ Simple Cuboidal Epithelium
‣ No microvilli or brush border
‣ Smaller cell size
‣ Flatter cells with easier to see nuclei
Distal Convoluted Tubule
LOOP OF HENLE
‣ Lined with Simple Cuboidal Cells
‣ Associated with a vascular network known as the Vasa Recta
‣ The vasa recta arises from the efferent arterioles Loop of Henle
ANATOMY OF BLADDERUreters
Detruser MuscleTrigone
Pubic Bone
Urethra
External Urethral Sphincter (skeletal)
BLADDER HISTOLOGY
‣ Mucosa Layer:
‣ Lined with Transitional Epithelium
‣ Muscularis Layer:
‣ Dense layer of smooth muscle
‣ Detrusor Muscle
‣ Adventitial / Serous layer:
‣ Membrane
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