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INTRODUCTION TO HUMAN BIOLOGY pp. 907-910
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cells tissues organs organ systems
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BODY TISSUES
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muscle: contract in coordination upon stimulation (skeletal, cardiac, smooth)
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nervous: receive and transmit information and signals (made of cells called neurons)
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epithelial: line surfaces of bodies, cavities, canals
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connective: cells surrounded by extra- cellular, non-living tissue called a matrix (bone, cartilage, tendons, blood)
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ORGANS Tissues working together
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BODY CAVITIES Spinal, cranial, thoracic, diaphragm, abdominal, pelvic Know the locations in your body
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ORGAN SYSTEMS Skeletal: protection and support Muscular: support and movement
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Respiratory: Gas exchange Circulatory: transport of gases, nutrients, waste, and chemicals througout body.
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Endocrine: controls body function via chemical messengers. Nervous: regulates body via impulses
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Digestive: breakdown and absorption of food Excretory: removal of liquid and solid wastes
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Reproductive: production of sex cells to make offspring Immune: Fights pathogens and disease
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Integumentary: protection and thermoregulation Barrier against mechanical and chemical injury Protection of microbial invasion Insulation against heat loss Evaporative cooling through sweating Sensory for environment Vitamin (D) synthesis
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SKIN Epidermis- dermal pigmentation Melanocytes make melanin (melanin is a black pigment and carotene is an orange pigment) and is inherited Dermis-inner layer composed of blood vessels, nerves, hair follicles, glands
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Glands 1. Oil glands attached to hair follicles secrete sebum (oils) 2. Sweat glands regulate body temperature Subcutaneous: fat cells (insulation)
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Nails are made of keratin (like hair) and protec ends of toes and fingers Hair is produced by hair follicles and insulates the body
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