The Kidneys
- Created by: Tripat
- Created on: 30-10-12 15:59
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- The Kidneys
- Structure
- Most people have two.
- Positioned on each side of the spine.
- Supplied with blood from the Renal Artery.
- Drained by the Renal Vein.
- The urine passes out of the kidney down the ureter to the bladder.
- In the longitudinal section, we can see that the kidney consists of easily identifiable regions surrounded by a capsule.
- In the centre is the pelvis which leads to the ureter
- The inner region is called the medulla
- The outer region is called the cortex
- The Role of the Kidneys
- The role of the kidneys is to remove waste from the blood and to produce urine.
- The Nephron
- The bulk of each kidney is made up of tiny tubules called nephrons.
- There are about 1 million nephrons in each kidney.
- The nephrons are closely associated with many tiny blood capillaries.
- Each nephron starts in the cortex
- In the cortex the capillaries form a knot called the glomerulus
- This (glomerulus) is surrounded by a cup shaped structure called the Bowman's capsule
- Structure
- In the longitudinal section, we can see that the kidney consists of easily identifiable regions surrounded by a capsule.
- In the centre is the pelvis which leads to the ureter
- The inner region is called the medulla
- The outer region is called the cortex
- Fluid from the blood is pushed into the Bowman's Capsule by the process of ultrafiltration
- Each nephron starts in the cortex
- In the cortex the capillaries form a knot called the glomerulus
- This (glomerulus) is surrounded by a cup shaped structure called the Bowman's capsule
- The capsule leads into the nephron which is divided into four parts
- Proximal Convoluted Tube
- Distal Convoluted Tube
- Loop of Henle
- Collecting Duct
- Each nephron starts in the cortex
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