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Anatomy and Physiology

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Anatomy and Physiology: The Integumentary System (Not for CE Credit)

COURSE INTRODUCTION Our skin, also called the integument, is an elastic, durable covering protecting our body, and is our largest organ. If the skin of an average-sized adult were spread out flat, it would cover an area of approximately 2 square meters and weigh about 4.5 kilograms, the size and weight...
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Anatomy and Physiology: The Cardiovascular System (Not for CE Credit)

COURSE INTRODUCTION The circulatory system is both ingenious in design and amazing in performance. It consists of four components: the heart, blood vessels, blood and lymph vessels. These four components work together to accomplish two important tasks: deliver oxygen and nutrients to and remove waste...
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Anatomy and Physiology: The Respiratory System (Not for CE Credit)

COURSE INTRODUCTION Every cell in our body needs oxygen: without it we would die within minutes. Every cell in our body must also rid itself of carbon dioxide. As we breathe--or respire-- we obtain oxygen by inhaling. When we exhale, we release carbon dioxide. Like other bodily functions such as heartbeat...
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Anatomy and Physiology: The Digestive System (Not for CE Credit)

COURSE INTRODUCTION Every time we eat, our food begins a remarkable journey through a long tube called the alimentary canal. Along the way chemicals and fluids are added to break down and process the food into substances called nutrients. These nutrients pass into the bloodstream, where they are delivered...
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Anatomy and Physiology: The Nervous System (Not for CE Credit)

COURSE INTRODUCTION Each organ system is crucial to maintaining our lives and completing even the simplest daily activities. The mere wiggle of a finger involves the integumentary, circulatory, muscular, and skeletal systems. One system however, coordinates all the activities of these other systems and...
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Anatomy and Physiology: The Muscular System (Not for CE Credit)

COURSE INTRODUCTION Found everywhere throughout the body, muscles are tough, elastic tissues that contract to make our body parts move. We use muscles to walk, jump, throw a ball or even blink an eyelid. Muscles in our chest make breathing possible, muscles in our heart pump our blood throughout our...
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Anatomy and Physiology: The Reproductive System (Not for CE Credit)

COURSE INTRODUCTION Each of us begins our individual life as a fertilized egg or zygote. Via the reproductive organs the female produces an egg cell--also called an ovum or gamete, and the male produces the fertilizing seed cell--also called a spermatozoon or sporophyte. When they fuse into one cell--the...
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Anatomy and Physiology: The Skeletal System (Not for CE Credit)

COURSE INTRODUCTION The skeletal system includes all the bones of the body plus the joints where they attach to each other. Our skeleton protects our internal organs, provides a framework or scaffolding that allows us to stand upright and move, stores minerals that our body needs to function properly,...
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Anatomy and Physiology: The Urinary System (Not for CE Credit)

COURSE INTRODUCTION Every cell in our body is like an engine. And, like the engine in a car for example, each cell requires fuel to run and also produces waste by-products that must be eliminated. The circulatory system delivers the fuel that cells require, including oxygen provided by the respiratory...
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Anatomy and Physiology: The Endocrine System (Not for CE Credit)

COURSE INTRODUCTION When we accidentally touch something hot, the heat sensation travels instantly along sensory nerves, and the impulse to jerk our hand away travels instantly back along motor nerves. The nervous system coordinates these kinds of quick-response actions. However, another type of coordination...
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