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Protection, Support, Locomotion

Protection, Support, Locomotion. Chapter 34. Tissue Types. Epithelial – outside layer of the body Connective – holds other tissues together Muscle – move the body Nervous – sends signals. Skin. Integumentary system Epidermis Dermis Hypodermis. Epidermis.

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Protection, Support, Locomotion

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  1. Protection, Support, Locomotion Chapter 34

  2. Tissue Types • Epithelial – outside layer of the body • Connective – holds other tissues together • Muscle – move the body • Nervous – sends signals

  3. Skin • Integumentary system • Epidermis • Dermis • Hypodermis

  4. Epidermis • Outer protective layer of skin • Dead cells on outermost layers • Filled with keratin – hard and water resistant • Innermost layer produces melanin

  5. Dermis • Contains: • Blood vessels • Nerves • Hair follicles • Sweat glands • Oil glands • Muscles • Hypodermis • Contains fat for protection and insulation

  6. Functions of Skin • Temperature regulation • Protection • Sensation • Vitamin production • Excretion

  7. Bones • Axial skeleton • Appendicular skeleton • There are 206 total

  8. Joints • Ligaments – attach bone to bone • Tendons – attach bone to muscle • Bursae – fluid-filled sacs that provide cushion • Cartilage – covers ends of bones

  9. Types of Joints • Ball and socket • Shoulder, Hip • Pivot • Tibia and Fibula • Hinge • Elbow, Knee • Gliding • Hand, Foot • Saddle • Thumb

  10. Long Bone Anatomy • Compact bone • Spongy bone • Periosteum • Marrow • Red • Yellow

  11. Bone Anatomy • Osteons • Osteocytes • Osteoblast • Osteoclast

  12. Functions • Protection • Support • Site of muscle attachment • Produce blood cells • Store minerals

  13. Muscles • Three types of muscle • Skeletal • Cardiac • Smooth • Involuntary • Voluntary

  14. Muscle Contraction • Fibers made of fibers • Muscle fibers • Myofibrils • Myosin • Actin • Units called sarcomeres • Move like a ratchet • Sliding filament theory

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