1. The Urinary System
Glatt, 2017

2. The Urinary System Eliminates wastes via urine
Osmoregulation (Regulates Hydration)

3. The Kidneys Main organs of the excretory system
2 organs about the size of fist
Blood enters through renal artery
Waste products are removed
Filtration
reabsorbtion
Filtered blood then reenters
Bloodstream through renal
vein

4. Nephrons and Filtration
Filtration- blood forced out in function units called nephrons
Millions of nephrons per kidney
Blood entering nephron from renal
artery is under high pressure and leaks
out in the glomerulus at Bowman’s
Capsule
-this fluid is called filtrate ( water,
urea, glucose, salts, amino acids,
some vitamin
Materials such as amino acids, fats, and glucose are pumped back into bloodstream
Rest of filtrate is now urine
Water is conserved and reabsorbed in loop of Henle
Osmosis
kidney
Kidney

5. The Ureters Tubes that lead from kidneys to urinary bladder
Carry urine from kidneys
to bladder

6. The Urinary Bladder Muscular hollow organ that stores urine
Can stretch
Holds urine until excretion (urination)

7. Uretha Tube that leads from urinary bladder to external environment
Excretes urine

8. Osmoregulation Balance of Water and salt
99 percent of water in is reabsorbed
The composition of blood and hormones that are released may increases or decreases the amount of water being reabsorbed
High salt in blood more reabsorbed
Low salt in blood less reabsorbed