قراءة
عرض

URINARY SYSTEM

urinary system


urinary system




urinary system

URINARY SYSTEM:

• paired kidneys.
• Ureters.
• Urinary bladder.
• Urethra.

Functions:


• Excretion of waste products
• Regulation of fluid & Electrolytes.
• Production of Renin.
• Production of Erythropoietin.
• Excretion of Drugs& Toxins.
• Activation of VIT D


urinary system




urinary system

KidneyBean shaped, reddish brown in color

urinary system

Concave medial border(hilum) convex lateral border

urinary system

Hilum of the kidneyvein /artery / ureter

urinary system

Capsule

urinary system





urinary system


urinary system

Cortex/medulla

urinary system

Cortex & medulla microscopically

Medullary Rays / Renal column
urinary system


urinary system




urinary system



Renal papilla
Minor calyx
Major calyx
pelvis
Pelvicalyceal system
ureter

Pelvicalyceal systemlined by special type of epithelium (urothelium)

urinary system


urinary system




urinary system

Renal papilla (Area cribrosa)

urinary system





urinary system

Kidney lobe

urinary system

Nephron (functional unit of kidney)

• Renal corpuscle.
• Proximal convoluted tubule(PCT).
• Loop of Henle.
• Distal Convoluted Tubule (DCT).


urinary system

Nephron

urinary system



Cortical & Juxtamedulary Nephrons


urinary system




urinary system




urinary system

Renal corpuscleGlomerulus + Bowman’s capsule

urinary system

Bowman’s capsuleParietal layer (simple squamous)visceral layer (podocytes)urinary space

urinary system




Urinary space


urinary system




urinary system

Vascular pole

Urinary pole


urinary system

Bowman’s capsule (EM) Parietal layer Visceral layer (podocytes) Urinary space

urinary system

Afferent & Efferent Arterioles of Glomerulus



urinary system

Glomerulus (EM)

urinary system


urinary system


1
2
3


urinary system

Podocytes (primary 1⁰, secondary2⁰ processes& pedicles)

urinary system



Filtration slits


urinary system

The Filtration(barrier) Blood Urine Barrier EM

urinary system


Blood Urine Barrier (EM)Podocyte PBasement membrane BL (central lamina densa surrounded by two lamina raraEndothelium E


urinary system


Mesangial cells (macrophage of kidney)Adherent to glomerular capillariesstructural support synthesize extracellular matrix

urinary system





urinary system


Mesangial cellsReceptors for (Angiotensin II, ANP).Endocytose and dispose of normal and pathological (immune complex). Produce chemical mediators such as cytokines, prostaglandins, interleukin-1, and platelet-derived growth factor.


urinary system

Proximal Convoluted Tubule PCTbegin at urinary pole

urinary system


PCT
DCT
Henle’s loop


urinary system

PCT functionReabsorption & Secretion



urinary system

Proximal Convoluted Tubule PCT

urinary system




urinary system

Brush border

PCT
urinary system




urinary system





urinary system

PCT & DCT

urinary system




urinary system

DCT , Henley's loop

urinary system




urinary system





urinary system




urinary system




urinary system




urinary system

Juxtaglomerular Apparatus:

urinary system




Macula Densa
urinary system




urinary system

Macula Densa

urinary system




urinary system

Histology of ureter

urinary system





urinary system




urinary system

Urinary bladder epithelium

urinary system

Urinary bladder epithelium (stretched)

urinary system

• The epithelium varies in different parts of the urethra.

• Both in the male and female the greater part of the urethra is lined by stratified columnar and pseudostratified epithelium.
• A short part adjoining the urinary bladder is lined by transitional epithelium.
• while the part near the external orifice is lined by stratified squamous epithelium.
Urethra



urinary system

Thank you




رفعت المحاضرة من قبل: Samih Al Hassan
المشاهدات: لقد قام 3 أعضاء و 388 زائراً بقراءة هذه المحاضرة








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