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Ch. 4 Sec. 3Ch. 4 Sec. 3Excretory SystemExcretory System
The Excretory System
Removes solid
liquid &
wastes
kidneys
major organsof excretion
eliminate urea, excess water, &
other wastes
• To locate your kidneys, put your hands on your hips, then slide your hands up until you can feel your ribs.
• Now if you put your thumbs on your back, you will know where your kidneys are.
• You can't feel them, but they are there.
bladder
•muscular bag that holds urine
• tube that carries urine from kidney bladder
• tube thru. which urine passes out of body
ureterureter
urethraurethra
Kidneys are essential to our well-being. Though they are small – about the size of a
clenched fist – people can’t survive very
long without them.
• Normally, people have two kidneys, located just under the ribs in the middle of the back.
• About 10 centimeters long and shaped like kidney beans, they are often called the body’s “master chemists” because of all the functions they perform.
urea= chemical that comes from breakdown of proteins - formed in liver
A chemical analysis can be useful in detecting medical problems. Normally, urine contains almost no glucose or protein.
nephrons•Tiny, filtering factories found in kidneys
•Remove wastes from blood & produces urine
urinary system
bladder - a hollow organ that stores urine until it is excreted. kidney – 2 bean-shaped organs that take waste from the blood & produce urine. ureter - 2 tubes, each of which carries urine from a kidney to the bladder. urethra - the tube that carries urine from the bladder out of the body.
bladder
kidney
ureter
urethra
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