The Urinary System

The Urinary System - The Urinary System I. General Anatomy...

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The Urinary System I. General Anatomy A. Primary Structures 1. kidneys 2. ureters 3. urinary bladder 4. urethra B. Primary Functions 2. eliminates nitrogenous wastes (urea) 3. regulates composition and volume of blood 4. help regulate blood pressure (hormone - renin) II. Kidney - between parietal peritoneum and posterior abdom wall A. Location 1. between T12 and L3 2. partially protected by ribs 11-12 3. right slightly lower than left (liver on right) B. External Anatomy 1. 4-5 inches long; 2-3 inches wide. Bean-shaped. 2. concave toward the midline 3. hilus - at concave center, site of ureter departure a. vessels, lymph, nerve enter/exit here 4. renal sinus - cavity where ureter enters 5. 3 layers around kidney a. renal capsule - innnermost fibrous membrane b. adipose capsule - fatty layer, protection c. renal fascia - outermost fibrous membrane C. Internal Anatomy 1. cortex - outer reddish area 2. medulla - inner reddish-brown area a. renal pyramids - triangular, apex to center
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The Urinary System - The Urinary System I. General Anatomy...

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