Anatomy & Physiology
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Transcript of Anatomy & Physiology
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ANATOMY & PHYSIOLOGY
The Skeletal System
http://micro.magnet.fsu.edu/primer/techniques/phasegallery/images/humanpathology/humanbone.jpg
Microscopic Image of Bone Cells:
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The Skeletal System: Contains bones, the
organs of this system
The tissues of this system: bone tissue, cartilage, blood, connective tissue & nervous tissue
Bones, no matter their location or size, have similar functions and structure
http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/9065.jpg
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Functions of Bones:1. Support: provide framework for the
body and surround organs2. Protection: enclose soft organs 3. Movement: Along with skeletal
muscles and tendons, enable the body to move.
4. Storage: Within the bone marrow (middle of the bone), Ca++ and P are stored.
5. Blood Cell Formation: Within the bone marrow, blood cells are formed; a.k.a. hematopoiesis.
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Classification of Bones: There are 206
bones in an adult body.
There are 2 types of bone: Compact Bone:
dense Spongy Bone,
a.k.a. Cancellous Bone: open spaces within the bone
There are 4 groups of bones: Long Short Flat Irregular
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Structure of the Bone: The diaphysis is the
‘shaft’ of the bone (bone length); mainly compact bone.
The epiphysis are the ends (of long bones); mainly spongy bone.
The periosteum is the bone covering, or membrane.http://www.google.com/imgres?
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Structure of the Bone: Red Marrow forms blood cells; this is found within
the epiphysis of some long bones and in spongy bone of flat bones.
Yellow marrow (fat) is found within the medullary cavity.
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Microscopic Structure of the Bone:
Osteocytes are mature bone cells. These are found w/in lacunae (cavities) which
form circles called lamellae. Lamellae form around Haversian (or
osteonic) canals. Canaliculi allow a ‘transportation’ system for
the bone cells (to receive blood and nutrients).
Perforating (or Volkmann’s) canals allow communication to occur.
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http://www.web-books.com/eLibrary/Medicine/Physiology/Skeletal/compact_spongy_bone.jpg
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Bone Formation: Osteo means bone.
Most bones form from hyaline cartilage.
This process is called ossification.
Bone forming cells are called osteoblasts.
http://www.johnwiley.net.au/highered/interactions/media/Support/content/Support/skel2a/frameset.htm
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Skeletal Organization: Look up labeled diagram in text or
online: KNOW THIS FIGURE! 2 major portions of the skeleton:
axial skeleton (bones & cartilage of the head & trunk) and the appendicular skeleton (bones & cartilage of the limbs).
There are 206 bones in the (adult) body.
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Axial Skeleton: The Skull:Cranium encloses the brainIncludes: Frontal bone Parietal Bones (2) Temporal Bones
(2) Occipital Bone Sphenoid Bone Ethmoid Bone
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Axial Skeleton: The Skull:Facial Bones, including: Mandible Nasal Bones Maxillary Bones
Hyoid Bone: suspended in the midneck above the larynx.
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Axial Skeleton: The Vertebral Column (Spine):
Contains 33 vertebrae 9 of these are fused
(form 2 bones): Sacrum and Coccyx
(tailbone) Cervical vertebrae are in
the neck region (1st 7) Thoracic vertebrae are in
the trunk (next 12) Lumbar vertebrae are in
the lower back (the last 5)
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Axial Skeleton: Thoracic Cage:
Protects the heart, lungs, and major BVs.
Includes:1. Sternum (breastbone) This is attached to the 1st 7 pairs of
ribs. The heart is posterior to the sternum.
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Axial Skeleton: Thoracic Cage:
2. 12 pairs of Ribs: True ribs are attached
to the sternum (1st 7) False ribs (next 5) Last 2 pair are a.k.a.
‘floating ribs’ b/c they lack attachment to sternum.
ALL ribs are attached to vertebral column!
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Appendicular Skeleton: The Shoulder:
Shoulder, or pectoral, girdle contains:
Clavicle (collarbone)
Scapula (shoulder blade) http://www.google.com/imgres?
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Appendicular Skeleton: The Upper Limbs:
The bones of the upper limb are: Humerus (arm) Radius (thumb to
forearm) Ulna (pinky finger to
forearm) Hand: Carpals (wrist),
metacarpals (palm), and phalanges (fingers)
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Appendicular Skeleton: The Pelvic Girdle:
Contains: Coxal Bones
(hip bones) which are composed of the ilium, ischium, and pubis
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Appendicular Skeleton: The Lower Limbs:
The thigh bone is a.k.a. the femur.
The leg bones are the tibia (shinbone; larger), fibula (thinner), and patella (kneecap).
The foot contains the tarsal bones (ankle & heel), metatarsals (sole) and phalanges (toes)
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Skeletal system websiteshttp://www.innerbody.com/image/skelfov.html
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Joints: These are a.k.a. articulations. This is where 2 or more bones come
together.
There are 3 types of joints: Fibrous Cartilaginous Synovial
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Joints:
Between bones that are close together, united by fibrous tissue.
Have limited movement, if any. Sometimes called immovable joints.
Ex. Sutures of the skull
Are shock absorbers & equalize pressure; united by fibrocartilage.
Limited movement.
Ex. Vertebrate
Fibrous Joints: Cartilaginous Joints:
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Synovial Joints:Must have: Articulating cartilage Articular capsule (there is a
membrane) Joint cavity (synovial fluid) Ligaments Many have bursae (flattened sacs of
fluid) and tendon sheaths (elongated bursae)
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Types of Synovial Joints:1. Ball-and-socket joints allows the
most movement: rotational movement, side-to-side, etc. Ex: shoulder or hip.
2. Condylar joints allow many motions but not rotational. Ex: between phalanges & metacarpels.
3. Plane joints allow sliding & twisting movements. Ex: wrist or ankle.
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Ball & Socket Joint:
http://www.eorthopod.com/images/ContentImages/hip/hip_arthroplasty/hip_arthroplasty_anat01.jpg
http://pioneer.netserv.chula.ac.th/~bkritcha/figure/images/condyloid.jpg
Condylar Joint:
http://www.shockfamily.net/skeleton/GLIDING.JPG
Plane Joint:
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Types of Synovial Joints:4. Hinge joints allows planar
movement only. Ex: elbow.5. Pivot joints allow rotational
movement around a central axis only. Ex: between radius & ulna.
6. Saddle joints allow a variety of movements. Ex: between carpal & metacarpal of the thumb.
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Hinge Joint:
http://www.eorthopod.com/images/ContentImages/elbow/elbow_anatomy/elbow_anatomy02a.jpg
Pivot Joint:
http://www.dartmouth.edu/~anatomy/assets/bones/elbow/elbow-supination.jpg
Saddle Joint:
http://www.shockfamily.net/skeleton/SADDLE.JPG
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BONE FRACTURES:http://www.slideshare.net/almasmkm/fracture-and-dislocation-ppt-almas-khan-khorfakkhan-hospital-dubai
REPAIR:https://www.youtube.com/watch?v=3RVjxl6wB0E
https://www.youtube.com/watch?v=VZF3xicLtTw
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Look these up in text or online!Know the following
diseases/imbalances:Rickets, fractures, herniated discs,
scoliosis, kyphosis & lordosis, bursitis, sprain, arthritis,
osteoarthritis, bone spurs, rheumatoid arthritis, ankylosis, and
gout, osteoporosis
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This slide show was developed by Dana Halloran, Cardinal Mooney High School, Sarasota, FL.
Used with her personal permission, adapted and amended by Rosa Whiting, Manatee School for the Arts, Palmetto, FL.