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The Excretory System


Christine M

on 18 October 2013

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Transcript of The Excretory System

Excretory/Urinary System
What is the Excretory System?
The Excretory System is a part of the human body that helps get rid of dangerous
and extra waste material that is inside of us. The process of this is called excretion.
The parts of the Excretory System are :
The kidneys, which filter our blood.
The liver, which absorbs dangerous substances and breaks them down to
make them easier for your body to digest.
The skin releases sweat from your body, which moderates the concentration
of sweat in your body and cools it.
The lungs actually remove carbon dioxide and water from your body, however,
the lungs are not usually recognized in the excretory system.
By Lily, Collin, Keri, and Christine
Gets rid of waste
Removes sodium and water
Produces hormones
Regulates electrolytes
Regulates blood pressure
Balances volume of fluids/minerals
in the body
Reacts to hormones sent from your brain
Did you know...

...everyday your kidney produces about
200 quarts of blood?
...the two most common causes of kidney
disease are diabetes and high blood pressure?
...each kidney has about one million nephrons?
Parts of a kidney
Removes amino acids not needed
Changes hemoglobin (a type of protein in red blood cells)
from worn-out red blood cells to substances that can be used
Turns harmful poisons and drugs in your body to harmless
Excretes wastes like urea and ammonium
Renal Artery
Renal Vein
Right Lobe
Left Lobe

Did you know...

...the liver weighs about 3.5 pounds?
...it is the organ in your body which is most subject to injury?
...it can repair itself when damaged?
Hepatocytes are the cells of a liver. They have the ability to reproduce in order to help repair the liver when damaged. However, this is not always guranteed, repetitive injuries can lead to liver failure and death.
Basic structure of the kidney;
regulates concentration of
water and substances by
filtering the blood, reabsorbing
what is needed and releasing
the rest as urine
provides kidney
with blood
drains the
The urine that the
kidney produces goes
through this "tube" to
the bladder
Parts of a liver
stores fats and cholestorol,
which are used as a source
of sugar for red blood cells
and your brain
The liver is mainly divided
into 2 halves; this being the
left one.
Reservoir for bile, a
compound to help
in digestion; goes
from liver to
Renal Pelvis
The Renal Pelvis is funnel like
and its main job is to act like a
funnel for urine flowing to the ureter
Subcutaneous Tissue
Sweat Glands
Small openings or holes
that are connected to
the sweat glands; helps
get rid of excess water,
wastes, and salts. When
your perspiration evaporates,
you cool down, regulating your
body temperature
"Coils of tubing" surrounded by
tiny blood vessels (capillaries);
wastes in the capillaries are
absorbed by the sweat glands
and leave through the pores
Tiny blood vessels
(see sweat glands)
Outer layer of the skin, has flat cells
that stack up. When new cells are
produced on the bottom of the
epidermis, the old cells are pushed
up. Being far away from their food
supply, the old cells die and shed.
Thicker than the epidermis,
full of blood vessels and
connective tissue. Upper layer
of the dermis has small
projections and because the
epidermis is layered on top
of these, they form ridges on
your fingers, which are your
A layer of fat in your skin
helps perspirate
cools body
relases oils from glands
protects your body from internal damage
blocks out water so important nutrients aren't washed away
Did you know...
...the skin is the largest
organ in the body?
... it covers 1.5-2 meters in a
person and is 4 mm deep?
Excretory Diseases 101
What diseases can I get?
Liver Disease:
When you have liver disease or cirrhosis,
your liver cells become damaged and bands
of scar tissue start to form. The liver can
not function.

Kidney Disease:
The nephrons of the kidney get damaged and
prevent them from filtering harmful
How would I get them?
Liver Disease:
Too much alcohol, hepatitis, poisons in
the environment, medications, and
blocked bile ducts can cause this deathly

Kidney Disease:
Poisons swallowed/inhaled, diabetes, high
blood pressure can cause kidney disease.
How should I prevent them?
Both of these diseases cannot be
cured, but can be treated.
Liver Disease:
Get vaccines for hepatitis and avoid too much alcohol, drugs, and fatty foods.

Kidney Disease:
Get a yearly checkup that includes
checking your blood pressure
and a urine test. Stay away from
harmful chemicals.
How do I treat it?
Liver Disease:
Eating more calcium, vitamin B, and iron will help regenerate some of the cells in your liver and heal some of
the damage done.

Kidney Disease:
Watch your diet. Make sure
you are eating enough protein and
less sodium because sodium can
increase your blood pressure. Have
less potassium because the kidney
will have a hard time processing it.
(**Your blood pressure should be
under 130 but over 80.)
Of course, you can always
have a kidney/liver transplant
but it may not always work.

parts of the skin
What are the symptoms?
Kidney Disease:
The symptoms are changes in urination, fatigue, illness, weakness, loss of apetite, vomiting, chest pain, etc. There are many symptons to
kidney disease. If you feel uncomfortable and are experiencing horrible symptoms similar to these, consult a doctor.
Liver Disease:
If you are recieving headaches, having
skin problems, depression, moodswings,
strokes, backpain, etc. you may have
liver disease.
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