Components and functions of the body's organ systems • Figure 1.2
Integumentary system
Skin, hair, and nails provide an outer
covering that protects the internal systems,
senses the outside environment, regulates
body temperature, and eliminates some
Skeletal system
Bones and joints provide a framework for
all the organs and systems of the body.
Bones also produce blood cells and
store minerals.
Muscular system
Muscles move the parts of the framework
and provide force for various functions.
Nervous system
Endocrine system
The brain, spinal cord, and nerves rapidly sense
Various glands communicate chemi-
the internal and external environments, process
cally with target organs and coordinate
information, and enable the various systems to
numerous body functions.
communicate and coordinate.
Cardiovascular system
The heart and blood vessels form a pumping
system that delivers oxygen and nutrients to all
cells and tissues, while removing carbon
dioxide and wastes. Blood components also
help fight disease
and regulate
acidity of body
fluids.
4 CHAPTER 1
Organization of the Human Body
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