The Urinary System

Organs of the Urinary System kidneys ureters Organs of the Urinary System urinary bladder urethra

Urinary System Two Kidneys Two Ureters Urinary Bladder Urethra Perform all filtering functions except actual excretion. Two Ureters Bring urine from Kidneys to Urinary Bladder Urinary Bladder Holds Urine until excretion Can stretch Urethra Moves urine from bladder to outside of body

Function Kidneys are a blood filter Remove nitrogenous wastes (urea, uric acid and ammonia) Maintain electrolyte, acid-base, Maintain fluid balance of blood (and therefore blood pressure)

Over 180 liters (50 gallons) of blood pass through the kidneys every day. When this blood enters the kidneys it is filtered and returned to the heart via the renal vein.

Kidney- External Anatomy Lateral surface- convex Medial is concave- Hilum Opening to Kidney Sinus Space within hilum Kidneys receive blood vessels and nerves.

Kidney Internal Anatomy I Renal arteries and veins Bring blood in and out of kidney Renal cortex Outer layer of Kidney Renal medulla Inner layer of Kidney

Kidney Internal Anatomy II Renal Pyramids Extensions of ureter Renal Columns Space between pyramids within the medula Renal Papilla Narrow end of pyramid Calyx (ces) Collecting tubes Renal Pelvis Collecting vessel prior to ureter