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  2. Urinary system - Wikipedia

    en.wikipedia.org/wiki/Urinary_system

    The human urinary system, also known as the urinary tract or renal system, consists of the kidneys, ureters, bladder, and the urethra.The purpose of the urinary system is to eliminate waste from the body, regulate blood volume and blood pressure, control levels of electrolytes and metabolites, and regulate blood pH.

  3. Kidney - Wikipedia

    en.wikipedia.org/wiki/Kidney

    Each kidney, with its adrenal gland is surrounded by two layers of fat: the perirenal fat present between renal fascia and renal capsule and pararenal fat superior to the renal fascia. The human kidney is a bean-shaped structure with a convex and a concave border. [ 14 ]

  4. Excretory system - Wikipedia

    en.wikipedia.org/wiki/Excretory_system

    The ureters are muscular ducts that propel urine from the kidneys to the urinary bladder. In the human adult, the ureters are usually 25–30 cm (10–12 in) long. In humans, the ureters arise from the renal pelvis on the medial aspect of each kidney before descending towards the bladder on the front of the psoas major muscle. The ureters cross ...

  5. Nephron - Wikipedia

    en.wikipedia.org/wiki/Nephron

    Fig.1) Schematic diagram of the nephron (yellow), relevant circulation (red/blue), and the four methods of altering the filtrate. The nephron is the functional unit of the kidney. [3] This means that each separate nephron is where the main work of the kidney is performed. A nephron is made of two parts:

  6. Mammalian kidney - Wikipedia

    en.wikipedia.org/wiki/Mammalian_kidney

    Vascular system of the kidney is also developed with the development of nephrons, with large vessels branching from the dorsal aorta. [176] In some mammals, kidney organogenesis ends before birth, while in others it may continue for some time into the postpartum period [177] (for example, in rodents it ends about a week after birth). [178]

  7. Renal physiology - Wikipedia

    en.wikipedia.org/wiki/Renal_physiology

    Diagram showing the basic physiologic mechanisms of the kidney. The kidney's ability to perform many of its functions depends on the three fundamental functions of filtration, reabsorption, and secretion, whose sum is called renal clearance or renal excretion. That is: Urinary excretion rate = Filtration rate – Reabsorption rate + Secretion ...

  8. Proximal tubule - Wikipedia

    en.wikipedia.org/wiki/Proximal_tubule

    The proximal tubule is the segment of the nephron in kidneys which begins from the renal pole of the Bowman's capsule to the beginning of loop of Henle.At this location, the glomerular parietal epithelial cells (PECs) lining bowman’s capsule abruptly transition to proximal tubule epithelial cells (PTECs).

  9. Kidney (vertebrates) - Wikipedia

    en.wikipedia.org/wiki/Kidney_(vertebrates)

    Blood enters the kidney through the renal artery, which in the multilobar kidney then branches in the region of the renal pelvis into large interlobar arteries that pass through the renal columns. [ 62 ] [ 63 ] The pyramids consist mainly of tubules that transport urine from the cortex, that produces it by blood filtration, to the tips of the ...

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