Urinary System

OBJECTIVES

ANATOMY

KIDNEY STRUCTURE

COMPOSITION OF

NEPHRONS

IDENTIFICATION OF

NEPHRON

COMPONENTS

EXCRETORY

COMPONENTS

FUNCTION of the

urinary system

URINARY SYSTEM

- FUNCTION IN

HOMEOSTASIS

RID BODY OF WASTE (UREA, URIC ACID,

CREATININE, SALTS)

PRESERVES CONSTANCY OF

EXTRACELLULAR FLUID IN COMPOSITION,

VOLUME, AND pH

ENDOCRINE FUNCTION

a) SECRETE ERYTHROPOIETIN - RED BLOOD

CELL PRODUCTION

b) PRODUCES RENIN - ALDOSTERONE RELEASE

Urinary System VIBS 443/602

260

458

19713 kidney cortex

19713 kidney cortex

EM 18b

EM 18a

285

Renin granules in Kidney (PAS)

258

Vascular and urinary poles of Kidney, cortex

259

34400

19713 kidney medulla

Kidney medulla (Lee’ s stain) –

thin portion of loop of Henle 254

rat Kidney medulla–

thin portion of loop of Henle 36748

19713 kidney thin loop of Henle in cortex

Thin portion of Cortical nephrons

Cortical nephrons

Juxtamedullay nephrons

Loop increases

temperature over

straight tube

with same

amount of heat

458 kidney

458 kidney

ARTERIAL PORTAL SYSTEM CAPILLARY PORTAL ARTERIOLE CAPILLARY = afferent ARTERIOLE, efferent ARTERIOLE, and PERITUBULAR CAPILLARIES

Kidney - Rich blood supply of

paritubular capillaries and vasa recta

260

rat Kidney medulla–

thin portion of loop of Henle 36748

19713 kidney

458 kidney

458 kidney

Ureter – transitional epithelium

and smooth muscle

262

Urinary bladder, monkey

160

Urethra

Urethra

of penis

Female

and Male

Urethras