Presentation on theme: "Ch 26: Urinary System Objectives Identify and describe the components of the urinary system and their function Describe the (histological) organization."— Presentation transcript:
Ch 26: Urinary System Objectives Identify and describe the components of the urinary system and their function Describe the (histological) organization of the nephron Identify the blood vessels that supply blood to the nephrons Describe the blood flow through and around the nephron
Functions of Urinary System (Kidneys): Excretion of organic waste products Regulation of blood Volume pH Ion concentration
Kidney Location Lateral to vertebral column in retro- peritoneal position
Surface Anatomy Hilus Three layers Renal fascia Adipose capsule Renal capsule
Sectional Anatomy Cortex: light reddish brow and granular (due to many capillaries) Medulla: darker striped appearance (due to tubules) Subdivided into distinct renal pyramids. Separated by renal columns from the cortex. Fig 26-3
Urine collection: Ducts within each renal papilla release urine into minor calyx major calyx renal pelvis ureter
Urine Transport, Storage, and Elimination Trace drop of urine from kidneys to outside world Lining of these parts? Lining Nephroptosis (= floating kidneys) Nephroptosis Nephrolithiasis
Transitional Epithelium empty bladder full bladder from renal pelvis to neck of urethra.
Supine position Upright position: 1 st degree nephroptosis: Nephroptosis
Nephrolithiasis occurs when urine becomes too concentrated and substances crystalize. Symptoms arise when stones begin to move down ureter causing intense pain. Kidney stones may form in the pelvis or calyces of the kidney or in the ureter.