Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Fundamentals of Anatomy & Physiology SIXTH EDITION Frederic H. Martini PowerPoint ® Lecture Slide Presentation prepared by Dr. Kathleen A. Ireland, Biology Instructor, Seabury Hall, Maui, Hawaii Chapter 26, part 4 The Urinary System
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings SECTION 26-6 Urine Transport, Storage, and Elimination
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Urine production ends with fluid entering the renal pelvis Rest of urinary system transports, stores and eliminates Ureters Bladder Urethra
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure Figure A Radiographic View of the Urinary System
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Pair of muscular tubes Extend from renal pelvis to the bladder Peristaltic contractions force urine toward the urinary bladder The ureters
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Hollow, muscular organ Reservoir for the storage of urine Contraction of detrusor muscle voids bladder Internal features include Trigone Neck Internal urethral sphincter Ruggae The urinary bladder
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 26.19a Figure Organs for the Collection and storage of Urine
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 26.19b Figure Organs for the Collection and storage of Urine
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 26.19c Figure Organs for the Collection and storage of Urine
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Extends from the urinary bladder to the exterior of the body Passes through urogenital diaphragm (external urinary sphincter) Differs in length and function in males and females The urethra
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 26.20a Figure The Histology of the Organs that Collect and Transport Urine
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 26.20b, c Figure The Histology of the Organs that Collect and Transport Urine
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Urination coordinated by micturition reflex Initiated by stretch receptors in wall of bladder Urination requires coupling micturition reflex with relaxation of external urethral sphincter Micturition reflex and urination
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure The Micturition Reflex Figure 26.21
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure The Micturition Reflex Figure 26.21
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings SECTION 26-7 Aging and the Urinary System
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Decline in the number of functional nephrons Reduction of GFR Reduced sensitivity to ADH Problems with the micturition reflex Changes with aging include:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings The components of the urinary system and their functions The location and structural features of the kidneys The structure of a nephron, and the processes involved in the formation of urine The normal characteristics, composition, and solute concentrations of a representative urine sample You should now be familiar with:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings The factors that influence filtration pressure and the rate of filtrate formation The types of transport mechanisms found along the nephron How antidiuretic hormone and aldosterone levels influence the volume and concentration of urine You should now be familiar with: