Download The excretory system3 - Bingham-5th-2014

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The purpose of the excretory system is to clean the
blood from waste and hold the waste until time for
elimination. There are three main parts of the
excretory system. The inferior vena cava and the
abdominal aorta, The renal vain and artery, The
kidneys , the bladder, and the ureters.
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The first stop on our journey is the inferior vena
cava and the abdominal aorta. The inferior vena
cava and the abdominal aorta bring blood to the
renal vain and artery, and out to the body and
heart. They are the blood carriers in the excretory
system. Without them the blood would not be
clean. But there is one other thing that gets blood
to the kidneys.
Next we go to the renal vain and renal artery. The renal
vain and renal artery are very important in the excretory
system without them blood would float in your body
and it would not be able to be cleaned.
 Blood enters the kidneys through the renal vain and the
renal artery. That is how blood enters the kidneys to be
cleaned.
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All that blood has to go somewhere right? The
kidneys are two bean shaped organs In your lower
back area. Your kidneys are about 4-5 inches long
and is probably the most major organ in the
excretory system. The clean blood goes back to
the body and heart, and the “dirty” blood goes
down through the ureters.
https://www.youtube.com/watch?v=Orf76C2zNG4
https://www.youtube.com/watch?x-ytcl=84503534&v=s2U2iZQxkqI&x-yt-ts=1421914688
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The ureters are tubes that connects the kidney’s
and the bladder. Each ureters is about 8 to ten
inches long. Small muscles in the ureters push the
waste to the bladder. This prevents waste from
getting stuck in the kidneys or backing up into the
kidneys.
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The bladder is a balloon shaped organ connected
to the ureter. The bladder gets larger when waste
enters. Muscles around the bladder get smaller so
that waste doesn’t leak when entering the
bladder. When the bladder is full it sends a
message to your brain saying you have to go to
the bathroom!
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The tube that leads waste out of the body is the
urethra. Without it the waste would be stored in the
bladder until it becomes very uncomfortable and
then you would become very sick and might even
die.
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The excretory system works with other systems too.
The brain from the nervous system works with the
excretory system because when your bladder is
about ¼ full your nerves send a message to your
brain telling you that it is time to go.
If you had a spinal cord injury your brain could not
tell you when to go to the bathroom so you would
have a accident.
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The circulatory system also works with the excretory
system. The blood goes through arteries and veins
to either the kidneys or back to the heart. If both
kidneys failed then you would die because your
cells would die of lack of nutrients.
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Chronic kidney disease happens when you have
high blood pressure or diabetes. At the final stage
of chronic kidney disease your kidneys will not be
able to filter out enough waste and you will need a
kidney transplant.
Acute kidney injury is caused by sudden change in
kidney function. By sickness, injury, or by taking
certain medication.
Kidney stones are caused by large levels of
calcium, phosphorus (ph-a-s-for-us), oxalate in the
waste.
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To keep your kidneys healthy get your urine and
blood checked for diseases. Keep your blood
pressure at normal levels.
The urine of cats will glow under a black light.
 One in five adults admitted to urinating in
swimming pools, which means 20% of adults in
swimming pools have urinated in it.
 Snakes do not have a bladder, so when their urine
is made it is eliminated.
 Urine is 95% water.
 Eating beets can cause pink urine.
 Some dogs can detect cancer simply by smelling
people’s urine.
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http://facts.randomhistory.com/facts-about-urine.html
http://www.nlm.nih.gov/medlineplus/ency/article/0004
71.htm
http://www.medicinenet.com/kidney_failure/article.ht
m
http://www.mayoclinic.org/diseases-conditions/kidneyfailure/basics/definition/con-20024029
http://kidshealth.org/kid/closet/movies/USmovie.html?tr
acking=59983_E
http://www.webmd.com/kidney-stones/
https://www.brainpop.com/health/bodysystems/urinary
system/preview.weml
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Walker, Richard, John Woodward, Shaila Brown,
and Ben Morgan. Human Body: A Visual
Encyclopedia. New York, NY: DK, 2012. Print.
Caster, Shannon. Kidneys. New York: PowerKids,
2010. Print