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anatomy chapter 15 terms
anatomy quiz terms
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Anatomy
11th Grade
05/01/2012

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Term

Glomerulus


Definition
In the kidney, a tubular structure called the nephron filters blood to form urine
Term
Glomerular
Definition
Pertaining to the glomerulus, a tiny structure in the kidney that filters the blood to form urine.
Term
Hydronephrosis 
Definition
literally "water inside the kidney" - refers to distension and dilation of the renal pelvisand calyces, usually caused by obstruction of the free flow of urine from the kidney.
Term

Interlobar arteries

Definition
The interlobar arteries are vessels of the renal circulation which supply the renal lobes.
Term

Interlobar veins

Definition
The interlobar veins are veins of the renal circulation which drain the renal lobes.
Term

Juxtamedullary nephron

Definition
a type of nephron, found only in birds and mammals and not in other vertebrates. 
Term

Nephron

Definition
the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
Term

Peritubular capillaries

Definition
tiny blood vessels that travel alongside nephrons allowing reabsorption and secretion between blood and the inner lumen of the nephron.
Term

Podocyte

 
Definition
highly specialized cells with a complex cytoarchitecture. Their most prominent features are interdigitated foot processes with filtration slits in between. These are bridged by the slit diaphragm, which plays a major role in establishing the selective permeability of the glomerular filtration barrier.
Term

Proximal convoluted tubule

Definition
the portion of the duct system of the nephron of the kidney which leads from Bowman's capsule to the loop of Henle.
Term
Renal Artery
Definition

These normally arise off the side of the abdominal aorta, immediately below the superior mesenteric artery, and supply the kidneys with blood. Each is directed across the crus of the diaphragm, so as to form nearly a right angle with the aorta.

These also carry a large portion of total blood flow to the kidneys. Up to a third of total cardiac output can pass through the renal arteries to be filtered by the kidneys.

 
Term
Renal Cortex
Definition

 

the outer portion of the kidney between the renal capsule and the renal medulla. In the adult, it forms a continuous smooth outer zone with a number of projections (cortical columns) that extend down between thepyramids. It contains the renal corpuscles and the renal tubules except for parts of the loop of Henle which descend into the renal medulla. It also contains blood vessels and cortical collecting ducts.This the part of the kidney where ultrafiltration occurs. Erythropoietin is produced in this.

 

Term
Renal Medulla
Definition

the innermost part of the kidney. This contains the structures of the nephrons responsible for maintaining the salt and water balance of the blood.

Term
Renal Pelvis
Definition

This is the funnel-like dilated proximal part of the ureter in the kidney.The major function of this is to act as a funnel for urine flowing to the ureter.

 
Term
Renal Vein
Definition
These are veins that drain the kidney. They connect the kidney to the inferior vena cava. They carry the blood purified by the kidney.
Term
segmental arteries
Definition

These are branches of the renal arteries.

  • superior
  • inferior
  • anterior
    • anterior superior
    • anterior inferiorposterior

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Term
cordical radiate arteries
Definition
interlobular arteries of kidney.
Term
Efferent arterioles
Definition

These are blood vessels that are part of the urinary tract of organisms. These form from a convergence of the capillaries of the glomerulus. They play an important role in maintaining the glomerular filtration rate despite fluctuations in blood pressure.

 
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