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Title: Anat & Phys 10/23/06 Objectives: Class Topics
11/9/2018 Title: Anat & Phys 10/23/06 Objectives: To assess knowledge of the appendicular skeleton and learn about joints Class Topics Review Appendicular Anatomy quiz Unknown Bone lab Review Skeletal Anatomy Test Bone Physiology "Learning is not attained by chance, it must be sought for with ardor and attented to with diligence." Abigail Adams, 1780 (in a letter to son, John Quincy Adams) Friday, November 09, :57 PM
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Class Assignments Unknown bone lab 10/23/06
11/9/2018 Class Assignments What By When Unknown bone lab 10/23/06 Skeletal Anatomy Test 10/25/06 Due this class period Due next class period Due in the future
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11/9/2018 Unknown Bone Lab
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Skeletal Anatomy Test Review
11/9/2018 Skeletal Anatomy Test Review Bone labeling -38 NO WORD BANK! Vertebrae, ribs, lateral skull, superior skull, arm, leg Skull matching (from the skull quiz) 16 questions Joint matching 8 questions Gomphoses, syndesmoses, fibrocartilagenous, synovial, hinge, pivot, ball & socket, gliding Muscle attachment matching 5 questions Quadriceps femoris, biceps brachii, gastrocnemius, deltoids, sternocleidomastoid
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Skeletal Anatomy Test Review
11/9/2018 Skeletal Anatomy Test Review Multiple choice 6 questions Joints and pelvis Short answer Joints, injuries, and bones Shoulder separation, shoulder dislocation Long answer Curves of the spine What? Where? Why? When? Holes of the head Choose your 3 favorite holes (foramen, fissures, or meatus) and tell what bone it’s in, and what enters or exits through that hole Physical Lab Practical (15 items)
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Types of Bones Long - greater in length than width
11/9/2018 Types of Bones Long - greater in length than width arms, legs, forearms, hands, feet Short - equal in length and width carpals, tarsals Flat - thin and flat cranium, ribs, sternum Irregular bones of face and vertebrae
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Parts of a long bone Diaphysis Epiphysis Periosteum
11/9/2018 Parts of a long bone Diaphysis shaft of the bone Epiphysis ends of bones Periosteum Dense irregular connective tissue lining the bones Articular cartilage Hyaline – lining the joint
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Diaphysis Made of compact bone Yellow marrow
11/9/2018 Diaphysis Made of compact bone Very strong and limited open space within Easily broken w/stress against long axis Yellow marrow Used to store fat (make blood cells in extreme conditions) found in medullary cavity hollow region of compact bone Lined with endosteum (thin dict membrane)
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Walden Henry David Thoreau (1817 – 1862)
11/9/2018 Walden Henry David Thoreau (1817 – 1862) I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, to discover that I had not lived. I did not wish to live what was not life, living is so dear; nor did I wish to practice resignation, unless it was quite necessary. I wanted to live deep and suck out all the marrow of life, to live so sturdily and Spartan-like as to put to rout all that was not life, to cut a broad swath and shave close, to drive life into a corner, and reduce it to its lowest terms, and, if it proved to be mean, why then to get the whole and genuine meanness of it, and publish its meanness to the world; or if it were sublime, to know it by experience, and to be able to give a true account of it in my next excursion. “Dead Poets Society”
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Epiphysis Spongy bone (cancellous) more open spaces - like lattice
11/9/2018 Epiphysis Spongy bone (cancellous) thin layer of compact bone covering it more open spaces - like lattice Resists stress from many directions Red Marrow - Myeloid tissue Hematopoiesis - formation of blood cells erythropoiesis lymphopoiesis
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11/9/2018 Bone Composition Bones are composed of bone tissue, cartilage, dense connective tissue, blood-forming tissue, blood vessels, and nerves Bone tissue (matrix) organic collagen inorganic hydroxyapatite
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Hydroxyapatite Mineral crystals made from calcium carbonate
11/9/2018 Hydroxyapatite Mineral crystals made from calcium carbonate calcium phosphate 2/3 of total weight of bone very hard and not very flexible
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Bone Cells Osteoblasts Osteocytes Osteoclasts found within periosteum
11/9/2018 Bone Cells Osteoblasts found within periosteum Actively produce matrix Osteocytes Osteoblasts that are trapped within the matrix trapped in lacunae Osteoclasts wander the tissue dissolve the mineral salts of matrix
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Microscopic Structure of Bone
11/9/2018 Microscopic Structure of Bone Lacunae spaces where the osteocytes reside Lamellae thin sheets of matrix in which the lacunae are found form circles around haversian canals or osteonic canals Haversian canals parallel to long axis of compact bone contain blood vessels
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Microscopic Structure of Bone (cont.)
11/9/2018 Microscopic Structure of Bone (cont.) How does the blood get from the vessel to the osteocytes? Canaliculi Each system around a haversian canal is called an osteon or haversian system osteocytes, lacuna, canaliculi, lamellae
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Microscopic Structure of Bone (cont.)
11/9/2018 Microscopic Structure of Bone (cont.) Volkmann’s canals blood vessels that run perpendicular to the long axis of the bone connect osteons Spongy bone trabeculae - thin plates (beams) of bone leaving space for red marrow
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Bone Development and Growth
11/9/2018 Bone Development and Growth Intramembranous Bones start formation 5th week after conception in between two embryonic membranes precursor (stem) cells turn to osteoblasts Spongy bone on the inside and compact on the outside
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Bone Development and Growth
11/9/2018 Bone Development and Growth Examples flat bones of skull mandibles clavicles Endochondral bones all other bones except those that are intramembranous Starts 6th week after conception
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Endochondral Bones Precursor cells change into chondroblasts
11/9/2018 Endochondral Bones Precursor cells change into chondroblasts forms hyaline cartilage template of skeletal system in cartilage Blood vessels penetrate cartilage stimulate chondroblasts to osteoblasts
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From: http://www.accessexcellence.org/RC/VL/xrays/1wrist/hanpelu.html
11/9/2018 From:
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Endochondral Bones Primary ossification center
11/9/2018 Endochondral Bones Primary ossification center center of diaphysis 1st place osteoblasts begin to work Work out toward each epiphysis 2ndary ossification center epiphysis forms spongy bone down to epiphyseal plate
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Intersititial Growth (length)
11/9/2018 Intersititial Growth (length) Occurs at epiphyseal plate chondrocytes divide and move material toward epiphysis Closer to the diaphysis older cartilage converts to bone - increase length of diaphysis Chondrocytes stop growing when acted upon by hormones from the pituitary gland
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Interstitial Growth Epiphyseal line
11/9/2018 Interstitial Growth Epiphyseal line old epiphyseal plate in those that have ceased growth
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Appositional Growth (width)
11/9/2018 Appositional Growth (width) Osteoblasts lay down bone on surface Osteoclasts dissolve bone Osteoblasts work harder than osteoclasts weight bearing exercise
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Bone Remodeling Continually broken down and built back up
11/9/2018 Bone Remodeling Continually broken down and built back up every 30 years each bone is completely renewed
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Fractures Simple Compound greenstick - incomplete complete
11/9/2018 Fractures Simple greenstick - incomplete Stress???? complete communited - fragmentation Compound pierces the skin
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Healing fractures Immediately 48 hours Several days 4-6 weeks
11/9/2018 Healing fractures Immediately swelling, blood clot, lymphocytes 48 hours procallus - protein matrix Several days fibroblasts lay down periosteum chondroblasts and osteoblasts get to work 4-6 weeks osseous callus - internal splint - ends cemented together
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