Anatomy & Physiology!!
DO NOW
• Lets review some biology…
– How are our bodies organized?
– What are the characteristics of life?
– What factors do our bodies require for
survival?
– How do our bodies maintain homeostasis?
Objectives
• To define anatomy and physiology
• To explain the biological levels of
organization
• To list and describe the major
characteristics and requirements of life
• To explain homeostasis and give
examples of how the body maintains it
Chapter 1
“Introduction to Human Anatomy and Physiology”
Anatomy & Physiology
• Anatomy: branch of science that deals
with the structure of body parts.
• Physiology: concerns the functions of
body parts
• *Why is it important to study these
sciences?
Requirements for Life
1) Water
•
Provides environment for chemical reactions to take
place.
2) Food
•
Energy, build new materials, regulation
3) Oxygen
•
Releases energy from food
4) Heat
•
Determines rate of reactions
5) Pressure
•
Important in breathing
Maintaining Life…
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Made of cells
Responds to stimuli
Grows and develops
Reproduces
Needs energy!!
Adapts
Maintains homeostasis
Displays organization
Homeostasis
• Homeostasis= A stable internal
environment
• Maintained through homeostatic
mechanisms.
Homeostatic Mechanisms
1) Receptor
- Provides information about conditions.
2) “Set point”
- Tells what a particular value should be (ex:
temp = 98.6)
3) Effector
- Causes a response that alters internal
evironmental conditions.
Negative Feedback
Homeostatic Mechanisms
Levles of organization
Levles of organization
• Atoms moleculesmacromolecules
(proteins, carbs, nucleic acids, lipids)
• Macromolecules Cells Tissues 
organs  organ systems  Organisms!
Anatomical Terminology