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ระบบกำจัดของเสียโดยไต PowerPoint PPT Presentation


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ระบบกำจัดของเสียโดยไต. อ. วัชรวิทย์ มีหนองใหญ่. วัตถุประสงค์. เพื่อให้นิสิตทราบโครงสร้างและกลไกการทำงานของไต เพื่อให้นิสิตสามารถทราบเกี่ยวกับกลไกในการขับถ่ายปัสสาวะ เพื่อให้นิสิตรู้เกี่ยวกับกลไกการควบคุมสมดุลของน้ำโดยฮอร์โมนได้. อวัยวะขับถ่ายปัสสาวะ (Urinary organs). ไต ( Kidneys )

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ระบบกำจัดของเสียโดยไต

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Urinary organs

(Urinary organs)

  • (Kidneys)

  • (Renal pelvis)

  • (Ureters)

  • (Urinary bladder)

  • (Urethra)


Kidneys

(Kidneys)

  • Osmotic pressure

  • 1.5 1.5 24 .


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  • 2

  • aorta vena cava

  • renal arteries renal vein


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  • (Renal hilus)

  • Renal hilus (renal pelvis)


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  • (cortex) (medulla)

  • medulla pyramid minor calyx major calyx Pelvis ureter

  • pelvis major calyx ureter


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  • nephron

  • nephron 1

  • Nephron 2

    • Renal copuscle

    • (Tubule)


Renal corpuscle

Renal corpuscle

  • Nephron

  • Renal corpuscle

    Glomerulus (capillaries) Bowman's capsule glomerulus (Tubule)


Tubule

(Tubule)

  • (proximal convoluted tubule)

  • (Loop of Henle)

  • (distal convoluted tubule)

  • (collecting tubule)


Proximal convoluted tubule

(proximal convoluted tubule)

2

1) convoluted portion

2) straight portion


Loop of henle

(Loop of Henle)

  • (descending limb)

  • (ascending limb) 2

    • thin ascending limb

    • thick ascending limb


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(distal convoluted tubule)

  • Na+ , Cl- HCO3- K+, H+, NH4+ (morehypo-iso)

  • (Collecting tubule)


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(collecting tubule)

  • nephron nephron

  • pelvis ureter


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3

  • Filtration

  • Tubular secretion

  • Tubular reabsorption


Filtration

(filtration)

  • glomerulus glomerular capillaries Bowman's capsule


Reabsorption

(Reabsorption)

  • Proximal convoluted tubule Na+ (iso)

  • descending loop of Henle (hyper)

  • aescending loop of Henle (iso-hypo)


Reabsorption1

(Reabsorption)

  • distal convoluted tubule Na+ , Cl- HCO3- K+, H+, NH4+ (morehypo-iso)

  • Collecting tubule Na+ K+ Cl-

    ADH (iso)


Secretion

(Secretion)

  • (peritubular capillaries)


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  • renal arteries abdominal aorta renal hilus

  • afferent arterioles glomerular capillaries Bowman capsule

  • efferent arteriole peritubular capillaries renal vein posterior vena cava


Renal pelvis

(Renal pelvis)

  • minor calyces major calyces


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  • = , , , ,

  • ADH

    - collecting duct

  • Aldosterone

    - Na+j distal convolute tubule


Antidiuretic hormone adh vasopressin

Antidiuretic hormone (ADH) vasopressin

  • ADH


Aldosterone

(aldosterone)

  • Na+

  • aldosterone Na+


Renin angiotensin system

Renin-angiotensin system

  • affarent arteriole Na+ distal convolute tubule juxtaglomerular apparatus affarent arteriole Renin

  • Renin angiotensinogen angiotensin I angiotensin II


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Na+ DCT CT


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  • pH 7.4 pH 7.35

  • acidosis CO2 (H2CO3)

  • H+ H+

  • H+ NH3 NH4+ Cl- NH4Cl


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  • Alkalosis HCO3- H+

  • HCO3-

  • H+ pH


Thank you

THANK YOU


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