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Renal system. Urogenital System Functions. Filtering of blood, Removal of wastes and metabolites Regulation of blood volume and composition blood cell synthesis Synthesis of Vitamin D Reproduction and sexual function. URINARY SYSTEM ORGANS. KIDNEYS (2) URETERS (2) URINARY BLADDER
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Urogenital System Functions • Filtering of blood, Removal of wastes and metabolites • Regulation of • blood volume and composition • blood cell synthesis • Synthesis of Vitamin D • Reproduction and sexual function
URINARY SYSTEM ORGANS • KIDNEYS (2) • URETERS (2) • URINARY BLADDER • URETHRA
Urinary System KIDNEYS (2) URETERS (2) URINARY BLADDER URETHRA Based on: Mader, S., Inquiry Into Life, McGraw-Hill
Kidney External Anatomy It is bean-shaped. Retroperitoneal Extend from T12 – L3 The right kidney is lower than the left. At its hilum; ureters, renal blood vessels, lymphatics, and nerves enter and exit. At its superior end lies the adrarenal gland. Left kidney Right kidney
Internal Anatomy of Kidneys • Cortex: Outer area • Renal columns • Medulla: Inner area • Renal pyramids • Calyces • Major: Converge to form pelvis • Minor: Papillae extend • Nephron:Functional unit of kidney.
Ureters Muscular tubes through which urine flow from kidneys to urinary bladder. Lie on the posterior abdominal wall, Descend at tips of transverse process of lumber vertebrae.
Urinary bladder Urenary bladder Muscular organ pyramidal in shape. Lies in the pelvic cavity. Ureters are attached to it at the junction of superior wall and posterior wall (base). Inferiorly it is continuous with the urethra. urethra
Urethra Transports urine from bladder to outside of body The female urethra is about 4 cm. long, placed behind the symphysis pubis. Opens in the vestibule anterior to vaginal orifice. The male urethra varies from 17.5 to 20 cm., it is divided into three portions, the prostatic, membranous, and penile. It transmits urine and semen urethra