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CHAPTER 16

CHAPTER 16. Molluscs. Characteristics. Phylum Mollusca Over 90,000 living species and 70,000 fossil species Soft body and belong to the lophotrochozoa protostomes

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Nervous System

Nervous System. Objectives: Identify structures of the nervous system. Explain differences in the function of the peripheral nervous system and the central nervous system. D. Nervous Tissue. Nervous tissue is: found in the brain, spinal cord, and nerves. made up of:

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9.1 INTRODUCTION Neurons: masses of nerve cells.

9.1 INTRODUCTION Neurons: masses of nerve cells. Structural and functional units of the nervous system. Specialized to react to physical and chemical changes in their surroundings. Nerve impulses: electrochemical changes neurons transmit. NEURONS Cell body: rounded area

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Muscular System

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Muscle Structure and Function

Muscle Structure and Function. Skeletal muscle. Cardiac muscle. Smooth muscle. Types of Muscle. The human body is comprised of over 600 muscles Muscle makes up 30-35% (in women) and 42-47% (in men) of body mass. Three types of muscle:. Key Terms.

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CNS Neuroglial Cells

CNS Neuroglial Cells. Greatly outnumber neurons in the CNS (think worker ants vs. Queen ant) Microglial cells Scattered throughout CNS Support neurons and phagocytize bacterial cells and cellular debris Oligodendrocytes Occur in rows along nerve fibers

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