Urinary System Kidneys Gross Structure of Kidney Nephron Borders Location MLT DENTAL RADIOLOGY LEC 1 скачать в хорошем качестве

Urinary System Kidneys Gross Structure of Kidney Nephron Borders Location MLT DENTAL RADIOLOGY LEC 1

Also called Renal system or Urinary tract. The urinary system is the organ system responsible for the production and excretion of metabolic waste in form of urine. EXCREATION LUNG BILE IN KIDNEY UREA URIC ACID CRETANIN Parts: Kidneys (2 in number) Ureters (1 from each kidney) Urinary bladder Urethra Location: Lie on posterior abdominal wall On either side of vertebral column Below the diaphragm Retroperitoneal Colour: Reddish brown Shape: Bean shaped Dimensions: 11 cm (L) x 6cm (W) x 3cm (thickness) Weight: 150 grams Perirenal Fat: Structural fat Provide protection and anchoring functions Renal Capsule: Tough fibrous outer covering Protect internal delicate structures Borders: Concave (inner) Convex (outer) Hilum: Indented region on medial side Entry and exit point of renal artery, renal vein, lymphatics, nerve supply, and ureter Blood Supply: R/L Arterial – Renal artery R/L Venous – Renal vein Regions (Layers): Renal Cortex Outer layer, lies below the capsule Reddish – brown in colour Renal Medulla Innermost layer Divided into 8 - 10 cone-shaped masses of tissue – renal pyramid Renal Pyramids Base – originates at border b/w cortex and medulla, terminates at papilla Papilla → projects into the space of renal pelvis Renal Columns Projections (extensions) of renal cortex b/w the pyramids. Renal Pelvis A funnel-shaped continuation of the upper end of the ureter. It collects urine formed by the kidney. Major calyces Outer border of the pelvis is divided into open-ended pouches - major calyces. They extend downward and divide into minor calyces. Minor calyces Collect urine from the tubules of each papilla.