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Unit 19: Biology Part 2 Page 63 of 137
This disease is caused by bacteria, excretory system does, this makes
viruses, fungi, or parasites, and sense.
can be treated differently
depending on the cause. The excretory system removes
waste from the body. Since carbon
Introduction to the dioxide is a waste, and the lungs
Excretory System remove this gas, they are a part of
both systems.
One of the most important things
our body does is to keep the right In fact all the organs of the
amount of water and salt inside the excretory system are also part of
body. If the body had too much other body systems. The skin
water, cells would burst. If the removes water and salt, and is a
body had too little water and too part of the integumentary system
much salt, cells would shrivel up as well as the excretory system;
and die. the large intestine removes solid
waste and is a part of the digestive
Either extreme would cause major system as well as the excretory
problems. Keeping the balance of system.
water and salt just right is one job
of the excretory system. This Finally, the kidneys remove urea,
system is also responsible for salts, and water and is a part of
removing the waste the body the urinary system as well as the
creates through activities such as excretory system.
digestion. Removing waste is also
needed for cells to survive. This
process of removing wastes is
known as excretion.
The Organs of the
Excretory System
Earlier is this section, you learned
that the lungs are an important
organ in the respiratory system.
This is true, but the lungs are also
an organ of the excretory system. Figure 45 – The large intestine
If you think about what the is a part of both the digestive
and excretory system.
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