1. Nephrons – Rhymes with Efron
The Nephron
Filtering cells of the kidney
Over 1 million per kidney!!
Most in cortex
Some extend
from cortex to
medulla
Produce urine
Nephrons – Rhymes with Efron 1

3. Renal Corpuscle 2 parts 1. Glomerulus (part of the blood flow)
- high pressure, porous capillary bed
- allow solute-rich fluid to pass from blood -into glomerular capsule
- under high pressure
- forces materials smaller
than proteins into the
Bowman’s Capsule
2. Bowman’s capsule 3

4. Blood Vessels of the Nephron and Kidney
Glomerulus
Fed and drained by arterioles
Afferent arteriole—arises from tiny branches of the renal artery, brings blood to the nephron
Efferent arteriole—receives blood from the nephron
See page 520 figure 15.2c

5. Efferent arteriole moves out of the Bowman’s capsule and becomes the peritubular capillaries
Peritubular capillaries surround the nephron tubule (PCT, Loop of Henle, DCT)
Reabsorption occurs here
Peritubular capillaries drain into venules and eventually branch into the renal vein

6. Parts of the Nephron Bowman’s Capsule 1st part of the nephron
surrounds the glomerulus
Collects “filtrate”

7. Renal Tube Extending from Bowman’s capsule
For absorption of various materials back into the peritubular capillaries
Contain microvilli
3 parts
1. Proximal convoluted tubule (PCT)
2. Loop of Henle
3. Distal convoluted tubule (DCT)
Bowman’s capsule

8. Collecting Duct (collecting tubule)
Receives urine from multiple nephrons
Many collecting ducts run through the medullary pyramids to calyx and finally renal pelvis