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SP15 Anatomy Exam 2 > Development of the Urinary System (Embryo) > Flashcards

Development of the Urinary System (Embryo) Flashcards

1
Q

The urogenital system can functionally be divided into what two systems?

A

Urinary system

Genital system

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2
Q

Both the urinary system and genital system develop from a _____ _____ ____ (intermediate mesoderm)

A

common mesodermal ridge

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3
Q

As the intermediate mesoderm develops it moves in a _____ to ______ direction

A

cranial

caudal

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4
Q

In what week do we really begin to see the development of the urogenital system?

A

week 4

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5
Q

The urogenital system is derived embryologically from what mesoderm?

A

intermediate

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6
Q

Any structure derived from intermediate mesoderm is in a _______ position

A

retroperitoneal

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7
Q

The urogenital ridge can be separated into what two sections?

A

nephrogenic and genital

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8
Q

The kidneys develop in a ____ to ___ sequence

A

cranial

caudal

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9
Q

The kidney has 3 slightly overlapping kidney systems, what are they?

A

Pronephros (rudimentary, nonfunctional)
Mesonephros (function for a short time during early fetal period)
Metanephros (forms the permanent kidney)

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10
Q

Renoagenesis (kidney doesn’t develop at all) can be seen as early as day ____

A

23

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11
Q

The Pronephroid is the primitive _____ and is _______ in terms of functionality

A

kidney

non-functional

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12
Q

The pronephroid appears at day ____ and degenerates by day ____

A

21

24

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13
Q

The mesonephros appears in early week ___

A

4

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14
Q

The mesonephros begin to develop in the ____ and ___ vertebral levels

A

thoracic and lumbar

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15
Q

The thoracic segments of the mesonephros regress in week ____ but the mesonephric kidney continues functioning until week ____

A

5

10

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16
Q

The mesonephros is functional at what weeks?

A

6-10

17
Q

mesonephric vesicles develop in what direction?

A

craniocaudal

18
Q

The nephrogenic chord makes a space termed the _____

A

mesonephric vesicle

19
Q

The mesonephric vesicle begins to grow toward the mesonephric duct, forming what structure?

A

mesonephric tubule

20
Q

Mesonephric ducts extend into lower lumbar and fuse with cloaca, this structure contributes to the ___ ____

A

posterior bladder

21
Q

Canalization begins ____ and grows _____

A

caudally

cranially

22
Q

The mesonephric duct joining the cloaca initiates growth of the _______ _____

A

Metanephric diverticulum (ureteric bud)

23
Q

The metanephroid has 2 components what are they?

A

Collecting portion

Excretory portion

24
Q

The collecting portion gives rise to what structures?

A

renal pelvis, ureters, collecting ducts, major & minor calyces

25
Q

The excretory portion gives rise to what?

A

forms Bowmans capsule, PCT, DCT, and loop of Henle

26
Q

The metanephric blastema is a mass of ____ which gives rise to what structure?

A

mesencyme

kidney

27
Q

The ascent of the kidney occurs in what weeks?

A

6-9

28
Q

The kidneys initially form near the ____ end of the embryo

A

caudal

29
Q

The growth in length of the kidneys causes them to _____

A

ascend

30
Q

T/F: Kidneys drag their blood supply with them as they ascend

A

False. They do not drag them they send out new and slightly more cranial branches, which cause the regression of the more caudal branches

31
Q

If the kidney does not ascend it is called what?

A

pelvic kidney

32
Q

If the inferior poles of both kidneys fuse together what is it called?

A

Horseshoe kidney

33
Q

A kidney with more than 1 renal artery has _____ aa. and is usually caused by what?

A

supernumerary

improper regression of branches of arteries during ascent of the kidney

34
Q

The ______ will start to occlude and become obliterated and will be called the urachus in adults

A

Allantois

35
Q

The Allantois will start to occlude and become obliterated. This structure is called what in the adult?

A

urachus

36
Q

Persistent intraembryonic allantois can cause what 3 complications?

A

Urachal cyst
Urachal sinus
Urachal fistula

37
Q

When allantois closes off at either end, but you have swelling of fluid in it to create a pocket is termed what?

A

Urachal cyst

38
Q

Allantois closure at one end, open on the other is termed what?

A

Urachal sinus

39
Q

Alantois not closed off at all creates what?

A

Urachal fistula

SP15 Anatomy Exam 2 (8 decks)

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