Difference between revisions of "Kidney"

Revision as of 14:28, 17 November 2018

A drawing of a kidney.

Kidneys are organs in the excretory system that removes urea and excess water from the blood.

The kidneys are linked to the bladder by ureters.

The kidneys filter the blood to remove some toxic substances.

Kidneys are organs in the excretory system that removes urea and excess water from the blood.

The kidneys are responsible for osmoregulation.

As blood passes through the kidneys water, urea, glucose and salts diffuse into the kidney tubules. Glucose is completely reabsorbed into the blood while water is selectively reabsorbed depending on the water concentration in the blood.

The selective reabsorption of water is affected by anti-diuretic hormone. When the levels of anti-diuretic hormone are high most of the water is reabsorbed into the blood. When the levels of anti-diuretic hormone are low the water is not reabosrbed and is passed down the ureters to the kidneys.

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 [[File:KidneyClipart.png|right|300px|thumb|A drawing of a [[kidney]].]]
 [[Kidney]]s are [[organ]]s in the [[Excretory System|excretory system]] that removes [[urea]] and excess [[water]] from the [[blood]].
+===About the Kidneys===
+: The [[kidney]]s are linked to the [[bladder]] by [[ureter]]s.
+: The [[kidney]]s filter the [[blood]] to remove some [[toxic]] substances.
+==Key Stage 4==
+===Meaning===
+[[Kidney]]s are [[organ]]s in the [[Excretory System|excretory system]] that removes [[urea]] and excess [[water]] from the [[blood]].
+===About the Kidneys===
+: The [[kidney]]s are responsible for [[osmoregulation]].
+: As [[blood]] passes through the [[kidney]]s [[water]], [[urea]], [[glucose]] and [[salt]]s [[Diffusion|diffuse]] into the [[Kidney Tubule|kidney tubules]]. [[Glucose]] is completely reabsorbed into the [[blood]] while [[water]] is selectively reabsorbed depending on the [[water]] [[concentration]] in the [[blood]].
+: The selective reabsorption of [[water]] is affected by [[Anti-diuretic Hormone|anti-diuretic hormone]]. When the levels of [[Anti-diuretic Hormone|anti-diuretic hormone]] are high most of the [[water]] is reabsorbed into the [[blood]]. When the levels of [[Anti-diuretic Hormone|anti-diuretic hormone]] are low the [[water]] is not reabosrbed and is passed down the [[ureter]]s to the [[kidney]]s.