Presentation is loading. Please wait.

Presentation is loading. Please wait.

Health Occupations Skeletal System – Unit 1. Skeletal System Organs – BONES –206 in adult human Functions –Framework Supports muscles, fat, skin –Protection.

Similar presentations


Presentation on theme: "Health Occupations Skeletal System – Unit 1. Skeletal System Organs – BONES –206 in adult human Functions –Framework Supports muscles, fat, skin –Protection."— Presentation transcript:

1 Health Occupations Skeletal System – Unit 1

2 Skeletal System Organs – BONES –206 in adult human Functions –Framework Supports muscles, fat, skin –Protection Surrounds vital organs (skull, ribs) –Lever Muscles attach to bones to provide movement –Production of blood cells Produce RBC, WBC, platelets (hemopoiesis or hematopoesis) –Storage Stores most of calcium supply of body (bone activity)

3 Bone Tissue Composition Inorganic salts (calcium phosphate) Water Bone cells Blood vessels Nerves Collagen (elastic material)

4 Bone Tissue Must continually receive food & oxygen Has fever nerves & blood vessels than other tissues Grows for the first 18 – 20 years of life After growth stops, bone cells die & are replaced by new cells –Osteoblasts – cells that MAKE bones –Osteoclasts – cells that BREAK DOWN bones & reabsorb them

5 May contain –Ligaments – attach bone to bone –Tendons – attach muscle to bone 2 types of tissue –Compact tissue – dense –Cancellous – spongy & loosely packed

6 Four types of bones Long bones – longer than they are wide –Humerus – upper arm –Ulna – lower arm –Radius - lower arm –Femur – upper leg –Tibia – lower leg –Fibula – lower leg

7 Short bones Length & width are nearly equal Wrist Hand Ankles Feet

8 Flat bones Two layers of bone divided by a narrow span Skull Sternum – breast bone Ribs Scapula – shoulder blade

9 Irregular bones Bones that do not fit in any other group Face Spine Hip

10 Long Bone Parts Diaphysis –Long shaft of bone Epiphysis –Ends of the long bone Proximal distal

11 Diaphysis Proximal epiphysis Distal epiphysis

12 Medullary canal Cavity in diaphysis Contains yellow marrow –Fat cells

13 Diaphysis Proximal epiphysis Distal epiphysis Medullary canal

14 Endosteum Membrane lining medullary canal Keeps yellow marrow intact Promotes bone growth

15 Diaphysis Proximal epiphysis Distal epiphysis Medullary canal Endosteum Yellow marrow

16 Red Marrow Found in bones like vertebrae, ribs, sternum, cranium, proximal ends of humerus & femur Produces – RBCs, WBCs, platelets Diagnostic tool to identify bone diseases Can be transplanted in people with defective immune systems

17 Diaphysis Proximal epiphysis Distal epiphysis Medullary canal Endosteum Yellow marrow Red marrow

18 Periosteum Membrane covering the outside of bone Tough Contains blood vessels, lymph, & osteoblasts Necessary for bone growth, repair, & nutrition

19 Diaphysis Proximal epiphysis Distal epiphysis Medullary canal Endosteum Yellow marrow Red marrow Periosteum

20 Articular cartilage Thin layer Covers epiphysis to work as a shock absorber in joints (hollow strength activity)

21 Diaphysis Proximal epiphysis Distal epiphysis Medullary canal Endosteum Yellow marrow Red marrow Periosteum Articular cartilage

22 Groups of Bones Axial skeleton – 80 bones –Main trunk of body –Skull –Spinal column –Ribs –Sternum Appendicular skeleton – 126 bones –Extremities – arms & legs –Shoulder girdle –Pelvic girdle

23 Joints Place where two bones meet Grouped by how much movement is allowed –Synarthrosis joints – immoveable Cranium, suture joints –Amphiartrosis joints – slightly moveable Vertebral discs, symphysis pubis, sacroiliac –Diarthrosis joints – freely moveable Shoulder, elbow, wrist, fingers, knees, ankles, toes Ligaments – connect bone to bone –Hold bones together

24 Skull Composed of cranium & facial bones Cranium – spherical structure surrounding & protecting brain – 8 Frontal – 1 Parietal – 2 Temporal – 2 Occipital – 1 Ethmoid – 1 Sphenoid – 1 At birth, NOT solid bone Fontanels – soft spots or spaces between bones –allows for enlargement of skull as brain growth occurs Membrane & cartilage that turn to bone by 18 months of age

25 Frontal bone Parietal bone Temporal bone Occipital bone Sphenoid bone Ethmoid bone

26 Skull Facial bones – 14 –Mandible – 1 lower jaw –Maxilla – 2 upper jaw –Zygomatic – 2 cheek –Lacrimal – 2 inner aspect of eye –Nasal – 5 –Palatine – 2 hard palate or roof of mouth

27 Frontal bone Parietal bone Temporal bone Occipital bone Sphenoid bone Ethmoid bone Mandible Maxilla Zygomatic bone Lacrimal bone Nasal bones Palatine – not pictured, roof of mouth

28 Skull also contains Sinuses –Air spaces in bones of skull Act as resonating chambers for voice Lined with mucus membranes Foramina –Openings in bone allowing nerves & blood vessels to enter & leave Sutures –Areas where cranial bones have joined together

29 Frontal bone Parietal bone Temporal bone Occipital bone Sphenoid bone Ethmoid bone Mandible Maxilla Zygomatic bone Lacrimal bone Nasal bones Palatine – not pictured, roof of mouth Coronal suture Squamous suture Lamboidal suture External auditory meatus Mastoid process Styloid process Mental foramina


Download ppt "Health Occupations Skeletal System – Unit 1. Skeletal System Organs – BONES –206 in adult human Functions –Framework Supports muscles, fat, skin –Protection."

Similar presentations


Ads by Google