To maintain the body's state of homeostasis by regulating fluid & electrolytes, removing wastes, & providing hormones involved in RBC production, bone metabolism, & control of blood pressure.
Urinary System structure
Carries urine from Kidneys to Bladder
Temporary storage of urine and its elimination
Carries urine from Bladder to Exterior
Elimination of urine
Bilateral tubes about 10-12" (25-30 cm) long
Sit behind the peritoneum on either side of the spine.
Right kidney is situated lower than the left because of the liver.
Highly vascular, bean shaped organs-size of a clenched fist
Known as notch located at the inner concave surface of ea. kidney. where the ureters, renal artery, renal vein, lymphatic vessels, & nerves enter or exit.
A dense layer of connective tissue protects & anchors the kidney.
Each kidney has 3 distinct regions
Cortex-outer layer contains glomeruli, small clusters of capillaries. The glomeruli are part of the nephrons, the functional unit of the kidney.
Medulla-inner portion of the kidney, nephrons for the renal pyramids, which channel the urine in to branches of the innermost region, the renal pelvis.
Pelvis-cavity or inner area. It is hollow & collects urine as it passes out of the collecting ducts (from the medulla) & urine is channeled from the pelvis through the ureters & into the bladder for storage.
The structural & functional unit of the kidney.
It processes the blood to make urine.
Urine is formed in the nephrons (1 million nephrons in ea. kidney)
Two major parts of a nephron
Renal corpuscle & Renal tubule
A renal corpuscle consists of a glomerulus (capillary network surrounded by Bowman's capsule) expanded end of a renal tubule & encloses the glomerulus.