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The Skin : Structure……….

The Skin : Structure………. a. Epidermis made of epithelial cells b. Dermis with sweat glands hair follicles oil glands capillaries nerve cells. The Skin..……….. the largest organ in the body. Function: protection temperature control

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The Skin : Structure……….

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  1. The Skin: Structure………. a. Epidermis made of epithelial cells b. Dermis with • sweat glands • hair follicles • oil glands • capillaries • nerve cells

  2. The Skin..……….. the largest organ in the body Function: • protection • temperature control • sensory • integrity of the body • secretions from glands • produces Vitamin D

  3. Exoskeleton: Endoskeleton: Support Systems may be: Internal set of bones Hard outer covering

  4. Human Endoskeleton made of • Axial: skull, backbone, ribs, sternum • Appendicular: arms, legs, shoulders, hips,wrists, ankles

  5. Endoskeletons also have……. Ligaments that hold bone to bone Tendons that hold muscle to bone, “muscle tenders” Joints where 2 bones come together

  6. Cartilage is replaced by bone during the process of bone formation called ossification. • Bone tissue forms as osteoblasts secrete mineral deposits. • When the osteoblasts become surrounded by bone tissue, they mature into osteocytes.

  7. Bone Structure:

  8. The Muscular System

  9. SKELETAL CARDIAC SMOOTH

  10. How Do Muscles Contract? Muscle bundles work in opposite pairs: Contracting & Relaxing (biceps & triceps in the arms)

  11. Sliding Filament Theory of Muscle Contraction: • Let’s Watch • 3d view

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