Key Points:
1. The diagram is of the nephron, and this is the part of the kidney that filters our blood. And the waste product is urine. The urine emerges from the bottom of the tubule. Urine is composed mostly of water, salts, and urea.
2. Urine is formed by a process. This starts in Bowmans capsule, and the process is known as ultrafiltration. The filtration of blood begins with blood in the kidney. When the blood enters the kidney it has a high pressure, and the blood enters a series of capsules known as the glomerialis, made up of smaller blood capsules. As the blood leaves, it goes through a blood vessle coming out of the bowmans capsule, and the diameter of this blood vessel is smaller. This is so that the blood pressure increases.
3. The high pressure forces the liquid within blood, plasma, and plasma contains all the useful things in blood such as salts urea glucose. These are all forced out of the blood vessel and into the inside of the Bowmans Capsule. The plasma becomes known as the filtrate, the glomarelia filtrate.
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