30.1 Organization of the
Human Body
-  Organization of the human
body
- Homeostasis
- Feedback Inhibition
Organization of the Human
body
•  Cells (smallest)
•  Tissues
•  Organs
•  Organ system
(largest)
Cells
•  The basic unit of
structure of the
human body.
•  Tend to be
specialized in
multi-cellular
organisms.
Tissues
•  A Tissue is a group of cells that
are working together.
Organs
•  Organs: a
group of tissues
that work
together to
perform a single
function or a
group of
functions.
Organ Systems
•  Organ
Systems: A
group of organs
that perform
closely related
functions.
Tissues
•  Epithelial
•  Connective
•  Nervous
•  Muscle
Epithelial Tissue
•  Lines the inside and
outside surfaces of
different organs.
•  Function(fxn):
Protection,
absorption, and
excretion
•  Example: Skin,
stomach lining.
Connective Tissue
•  Provides support for the body and its
parts
•  Bind epithelial tissue to structures,
support, and transport.
•  Examples: collagen, elastin
Nervous Tissue
•  Receives and transmits nerve
impulses (signals)
•  Example: Brain, spinal column,
and nerves.
Muscle Tissue
• Voluntary and
Involuntary
movements
• Skeletal, cardiac,
and smooth
muscles.
Name the organ without all
types of tissue.
Organ Systems that work
Together
Homeostasis
•  Homeostasis:
•  The relatively
constant internal
physical and
chemical conditions
that organisms
maintain despite
changes in their
environment
Examples of Homeostasis
•  Blood
pressure
•  Body
Temperature
•  Blood pH!
Feedback Inhibition
•  The way the body
maintains
homeostasis.
•  The body produces a
response to oppose
the original stimulus
•  Heater Example: the
heater shuts off after
the temp reaches a
certain level.