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Excretion > Human Excretory System > Flashcards

Human Excretory System Flashcards

1
Q

Human Excretory system consists of?

A

1) 1 pair Kidneys
2) 1 pair Ureters
3) 1 Urinary bladder
4) 1 Urethra

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2
Q

Why right kidney is Lower than left kidney?

A

Because liver is located above it

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3
Q

Shape of kidney?

A

Bean shaped

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4
Q

Colour of kidney?

A

Reddish - Brown colour

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5
Q

Length of kidney?

A

10-12cm

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6
Q

Width of kidney?

A

5-7 cm

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7
Q

Thickness of kidney?

A

2-3 cm

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8
Q

Weight of kidney?

A

120-170 gm

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9
Q

Location of kidney?

A

Close to dorsal inner wall of Abdominal cavity

Extends between T12(last Thoracic vertebrae)- L3(third lumbar vertebrae)

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10
Q

Function of Ureter?

A

Conduct urine from kidneys to urinary bladder

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11
Q

Epithelium of Ureter?

A

Transitional epithelium

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12
Q

Shape of urinary bladder?

A

Pear - shaped

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13
Q

Wall of urinary bladder consists of?

A

1) Smooth muscle called DETRUSSER muscle
2) Stretch receptors

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14
Q

Function of urinary bladder?

A

Store urine

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15
Q

Urethra is present in which organisms?

A

Only Mammals

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16
Q

Function of urethra?

A

Excrete urine out of the body

17
Q

Male urethra is longer than female urethra .
Is it true?

A

Yes

18
Q

Name the sphincters present in urethra?

A

1) Internal Urethral Sphincter ( Involuntary)
2) External Urethral Sphincter (Voluntary)

19
Q

Ureter of male frog?

A

Urinogenital duct

20
Q

Process of release of urine is called?

A

MICTURITION

21
Q

MICTURITION reflex?

A

Urinary bladder half - filled >Stretch receptors send signal to CNS > Motor signal from CNS > Bladder muscles contract and sphincter muscles relax > Release of urine/ Micturition

22
Q

Kidney is covered by a covering called ?

A

Renal Capsule

23
Q

Outer part of kidney is called?

A

Renal Cortex

24
Q

What is Renal Columns of Bertini?

A

Cortical tissue between medullary pyramids

25
Q

Renal Pelvis ?

A

1) Broad funnel shaped space
2) Inner to Hilum
3) Projections called Calyces

26
Q

Hilum ?

A

1) A longitudinal notch on inner concave surface of kidney
2) Towards Centre
3) Ureters , Blood vessels and N erves enter through it

27
Q

Renal Medulla/ Renal Medullary Pyramids?

A

1) Inner part
2) In form of few conical masses called medullary pyramids
3) Projecting into Calyces

28
Q

Functional unit of kidney ?

A

Nephron

29
Q

Location of kidney?

A

Partly in cortex and partly in medulla

30
Q

No of Nephrons in each kidney ?

A

1 million ( 10 lakh)

31
Q

Nephron consists of ?

A

1) Glomerulus
2) Renal Tubule

Excretion (3 decks)

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