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homeos - Organs ■ Two or more types of primary tissue ■...

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Human Physiology A short introduction to the field of human physiology
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Introduction Living systems possess a special organization Physiology studies two related aspects of that organization: structure and function For this reason physiology is closely related to Anatomy and Biochemistry
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Homeostasis This is the name for the processes which keep the condition and environment of the tissues in the proper condition to sustain life.
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Cells Cells are the basic units of life they make up tissues and organs in the body Cells can only come from other cells (The CELL THEORY)
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Tissues muscle nervous epithelial connective
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Glands Epithelial tissue Specialized for secretion Exocrine glands: secrete through ducts to the outside of the body Endocrine glands: ductless glands which produce hormones which are released into the blood
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Unformatted text preview: Organs ■ Two or more types of primary tissue ■ Organized to perform a particular function Examples of Organs ■ Stomach ■ Heart ■ Liver ■ Kidneys ■ brain ■ many others Homeostasis: The Essence of Life ■ Cells live in a fairly constant environment ■ The cells, in turn, constitute the tissues which provide that environment Body systems Homeostasis Cells Body Systems ■ Nervous ■ Endocrine ■ Immune ■ Circulatory ■ Muscle/skeletal ■ Integument ■ Respiratory ■ Urinary ■ Digestive ■ Reproductive Negative Feedback Fall in temperature Heat Connecting Circuit Thermostat Furnace + +-Negative Feedback Fall in blood pressure Increase in blood pressure Nerves Pressure sensors Heart and blood vessels + +-Failure of Homeostasis ■ Often leads to sickness and eventually death...
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