Term
| How is the urogenital Ridge formed? |
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Definition
| Is formed by intermediate mesoderm froms a longitudinal elevation along the dorsal body wall called urogenital ridge. |
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Term
| What part of the urogenital ridge gives rise to the urinary system? |
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Definition
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Term
| What are the 3 sets of nephric structures that form the nephric structures |
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Definition
| Pronephros, Mesonephros, Metanephros. |
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Term
| What does the pronephros develop into? |
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Definition
| Forms the pronephric tubules and pronephric duct. Cranial most nephric structure. transitory structure regresses completely by week 5 of development and is notfunctional in humans. |
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Term
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Definition
| develops by differentiation to form mesonephric tubules and mesonephric duct. middle nephric strucure.partially transitory. most regresses but duct persists as urogenital sinus. |
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Term
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Definition
| from outgrowth of mesonephric duct. ureteric bud. caudal most nephric structure. week 5 functional in fetus at about week 10 of development. |
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Term
| Metanephros further develops to kidney |
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Definition
| ureteric bud penetrates metanephric mesoderm and divides to form ureters, renal pelvis, major & minor callyces, and collecting ducts. |
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Term
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Definition
| Metanephric vesicles differentiate into collecting tubule, distal convuluted tubule, loop of henle, proximal convoluted tubule. nephron formation complete at birth. |
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Term
| Transitional epithelium of kidney |
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Definition
| Transitional epithelium lining the ureter, pelvis, major calyx, and minor calyx, and simple cuboidal epithelium is from MESODERM |
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Term
| Development of Urinary Bladder |
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Definition
| Formed from upper end of urogenital sinus. |
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Term
| What is the fate of allantois? |
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Definition
| Becomes a fibrous cod, the urachus (median umbilical ligament) in the adult. |
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Term
| Where do mesonephric ducts incorporate into the bladder? |
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Definition
| At the trigone on the posterior wall. |
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Term
| Where is the transitional epithelium of teh urinary bladder derived from? |
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Definition
| Endoderm => comes from urogenital sinus and gut tube. |
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Term
| How is the female urethra developed? |
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Definition
| Lower end of urogenital sinus. develops from endodermal outgrowths to surrounding mesoderm. Ends at vestibule of vagina. |
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Term
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Definition
| lower end of urogenital sinus. 1. Prostatic urethra into mesoderm form prostate gland. 2.Membranous outgrowth to mesoderm, bulbourethral glands. 3. Penile urethra develops endodermal outgrowths to surrounding mesoderm form Littre's glands. |
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Term
| Distal part of penile urethra |
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Definition
| formed from an ingrowth of surface ectoderm called glandular plate. joins penile urethra and becomes navicular fossa. |
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Term
| How is the foreskin formed? |
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Definition
| Ectodermal septa appear lateal to the navicular fossa. |
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Term
| The stratified squamous epithelium lining the distal part of penile urethra is derived from where? |
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Definition
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Term
| What are the two episodes in suprarenal cortex formation? |
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Definition
| Fetal cortex present at birth but regresses by second postnatal month. Zona glomerulosa, Zona Fasiculata of definitive cortex present at birth but zona reticularis not formed until age 3. |
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Term
| What causes Renal Agenesis? |
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Definition
| Ureteric bufd fails to develop thereby eliminating induction of metanephric vesicles and nephron formation. |
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Term
| What are the symptoms of unilateral Renal Agensis? |
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Definition
| Is asymptomatic and compatible with life. |
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Term
| What are the symptoms of Bilateral Renal Agenesis? |
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Definition
| Causes oligohydramnios during pregnancy, which allows uterine wall to compress fetus, resulting in potter syndrome. |
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Term
| What are the symptoms of potter syndrome? |
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Definition
| Deformed limbs, abnormal facial appearance. |
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Term
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Definition
| Ectopic kidney that occurs when one or both kidneys fail to ascendand therefore remain in the pelvis or lower lumbar area. |
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Term
| What is the term for when two pelvic kidneys fuse to form a solid mass. |
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Definition
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Term
| What occurs when inferior poles of kidneys fuse and normal ascent of kidneys is haulted? |
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Definition
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Term
| What causes a duplication of the urinary tract |
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Definition
| when ureteric bud prematurely divides before penetrating the metanephric mesoderm. results in either a double kidney or duplicated ureter and renal pelvis. |
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Term
| What is the cause of polycystic disease of the kidneys? |
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Definition
| loops of henle dilate, forming large cysts that severely compromise kidney function. relatively common hereditary disease. associated clinically with cysts of liver, pancreas, and lungs. |
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Term
| What is Exstrophy of the bladder |
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Definition
| occurs when the posterior wall of urinary bladder is exposd to exterior. failure of anterior abdominal wall and anterior wall of blader to develop properly. |
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Term
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Definition
| when remnant of allantois persists, thereby forming a cyst or sinus. found along midline on a path from umbilicus to apex of urinary bladder. often associated clinically with urine drainage from umbilicus. |
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Term
| Ectopic Ureteric Orifices (males) |
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Definition
| Ectopic ureter opens to neck of bladder or prostatic urethra |
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Term
| Ectopic Ureteric Orifices (females) |
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Definition
| opens into neck of bladder or vestibule of vagina. |
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Term
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Definition
| most common extracranial solid cancer in infancy and childhood. neuroendocrine tumor. 60% found in extrasuprarenal sites along sympathetic chain ggl. |
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Term
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Definition
| associated with urinary tract abnormalities, absence of iris, hemihypertrophy (enlargement of one side of body). tumor may become quite large but remains encapsulated. |
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