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Unit 19: Biology Part 2 Page 24 of 137

Objectives

Lesson 4: Respiratory & Excretory Systems

In this section, you will learn about  Common diseases of the

two different body systems: respiratory and excretory
respiratory and excretory systems. systems

The excretory system removes

waste from the body. The
respiratory system removes carbon
dioxide, which is one form of
waste, from the body. Along with
carbon dioxide, a major form of
waste is urine, which is removed
by the urinary system. This is
important because removing waste
is a crucial function of the body.

Diseases to any of these systems
can cause major problems for

individuals. At the end of this
section, you will know:

 The parts of the respiratory

system and what they do
 The path air takes as it goes
into and out of the body
 The way pressure affects
breathing
 The major parts of the
excretory system and the
other systems the organs of
the excretory system belong
to

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