Shared Flashcard Set

Details

Skeletal System
M6 Phase 1
75
Medical
Undergraduate 1
05/30/2013

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Cards

Term
Abduction
Definition
"Taking away from the body" Moving lateral
Term
Adduction
Definition
"Adding to the body" Moving midline
Term
Articular Cartilage
Definition
A thin layer of cartilage covering each epiphysis
Term
Circumduction
Definition
Circular movement
Term
Compact Bone
Definition
Hard and dense, provides strength and resistance to bending, composes the diaphysis wall
Term
Diaphysis
Definition
Shaft of bone, hollow tube made of hard, compact bone
Term
Endosteum
Definition
Thin membrane that lines the medullary cavity, inside wrapping of the bone
Term
Epiphyses
Definition
Ends of the bone, spongy
Term
Fontanel
Definition
Soft spot
Term
Hematopoiesis
Definition
Blood formation inside red bone marrow of long bone
Term
Medullary Cavity
Definition
Hollow area inside of diaphysis
Term
Osteoblasts
Definition
Bone forming cells
Term
Osteoclasts
Definition
Bone absorbing cells
Term
Osteocytes
Definition
Bone cell
Term
Osteon
Definition
Building block of bone, also known as Haversian Canals
Term
Periosteum
Definition
Strong and fibrous membrane covering a long bone everywhere except at joint surfaces, serves as point of attachment for ligament and tendons
Term
Spongy Bone
Definition
End of long bone
Term
Suture
Definition
Joint within the skull
Term
Skeletal System provides?
Definition
Framework, support, protection, movement, storage, hematopoiesis
Term
Type of bone marrow
Definition
White blood cells, red blood cells, and platelets
Term
5 Sections of the spine
Definition
Cervical, thoracic, lumbar, sacrum, coccyx
Term
Cervical Vertebrae
Definition
7 vertebral disks
Term
Atlas
Definition
C-1, first vertebral disk
Term
Odontoid process
Definition
C-2, second vertebrae, pivot for the atlas
Term
Thoracic Vertebrae
Definition
12 vertebral disks, have facets on the sides that articulate with the ribs
Term
Lumbar
Definition
Consists of 5 Vertebrae, longer and stronger bodies to support more weight than the vertebrae above them
Term
Sacrum
Definition
Triangular structure composed of five fused vertebrae, forms base of the vertebral column
Term
Coccyx
Definition
Lowest part of vertebral column, composed of four fused vertebrae
Term
Thoracic Cage
Definition
Contains 12 pairs of ribs, thoracic vertebrae, sternum, and costal cartilage; supports the pectoral girdle
Term
Types of ribs
Definition
True ribs, false ribs, floating ribs
Term
True Ribs
Definition
First seven pairs, costal cartilage of ribs join directly to sternum
Term
False Ribs
Definition
Remaining pairs, 8 through 12; cartilage of the upper three false ribs join the cartilage of the 7th rib
Term
Floating Ribs
Definition
Last two pairs of ribs, 11 and 12
Term
Sternum
Definition
Manubrium, body, xiphoid process
Term
Long Bones
Definition
Femur, Humerus; longer than they are wide
Term
Short Bones
Definition
Phalanges; shorter than they are wide
Term
Flat Bones
Definition
Sternum, cranium
Term
Irregular Bones
Definition
Vertebrae
Term
Canaliculi
Definition
Connect lacunae with one another and the central canal in each osteon
Term
Trabeculae
Definition
Needlelike threads of spongy bone that surround a network of spaces
Term
Concentric Lamella
Definition
Each ring within each osteon
Term
Endochondral Ossification
Definition
Formed as cartilage and later becomes bone tissue
Term
Intramembranous Bone Formation
Definition
Develop from layers of connective tissue. 5% form this way
Term
Axial Skeleton
Definition
Spine, Skull, Ribs
Term
Appendicular Skeleton
Definition
Bones of the arms, legs, and structures from which they hang
Term
Number of bones in the skull
Definition
22, 8 cranial and 14 facial
Term
Pectoral Girdle
Definition
Composed of two clavicles and scapulae, supports upper limbs and is an attachment for several muscles that move them
Term
Clavicles
Definition
Function to hold the shoulders in place and provide attachments for muscles of the uppe limbs, chest, and back
Term
Scapulae
Definition
Broad, triangular bones
Term
Bones of the upper extremity
Definition
Clavicle, scapula, humerus, ulna, radius, carpal bones, metacarpal bones, and phalanges
Term
Hand and Wrist
Definition
Composed of 8 carpals, 5 metacarpals, and 5 sets of phalanges
Term
Pelvic Girdle
Definition
Consists of 2 coxae bones that articulate with each other anteriorly and with the sacrum posteriorly; sacrum, coccyx, and pelvic girdle form bowl shaped pelvis
Term
Ilium
Definition
Largest and uppermost portion of the pelvic girdle
Term
Ischium
Definition
Lowest portion of the pelvic girdle
Term
Pubis
Definition
Anterior portion of the pelvic girdle
Term
Lower Limb
Definition
Consists of 7 tarsal bones, 5 metatarsal bones, and 5 sets of phalanges; largest is the heel bone
Term
Joints (Articulations)
Definition
Functional junctions between bones
Term
Types of Joints (Degree of Moving)
Definition
Immovable (synarthroses), slightly movable (amphiarthroses), freely movable (diarthroses)
Term
Types of Joints (by Type of Tissue)
Definition
Fibrous, Cartilaginous, Synovial
Term
Fibrous Joints (Synarthroses)
Definition
Found in synarthroses joints, thin layer of dense connective tissue joins bones (e.g suture)
Term
Cartilaginous Joints (Amphiarthroses)
Definition
Found in amphiarthroses joints, connected by disks of hyaline cartilage, allow limited movement (e.g costal cartilage)
Term
Synovial (Diarthroses)
Definition
Found in diarthroses joints, most joints in the skeletal system
Term
Classifications of Synovial Joints
Definition
Ball and socket, condyloid, gliding, hinge, pivot, saddle
Term
Ball and Socket Joint
Definition
Ball shaped head (i.e. shoulder & hip joints)
Term
Condyloid Joints
Definition
Oval shaped condyle of one bone articulates with an elliptical cavity of another (i.e between the metacarpals & phalanges)
Term
Gliding Joints
Definition
Articulating surfaces are nearly flat or slightly curved (i.e between the wrist and ankle bones)
Term
Hinge Joint
Definition
Convex surface of one bone articulates with the concave surface of another (i.e elbow)
Term
Pivot Joint
Definition
Cylindrical surface of one bone articulates with a ring of bone and fibrous tissue (i.e proximal ends of radius and ulna)
Term
Saddle Joint
Definition
Articulating surfaces have both concave and convex regions (i.e joint between the carpal and the metacarpal of the thumb)
Term
Dorsiflexion
Definition
Bringing towards the face
Term
Plantar Flexion
Definition
Back towards the ground
Term
Pronation
Definition
Back of the hands
Term
Supination
Definition
Palms of the hands
Term
Extension
Definition
To increase the angle of a joint
Term
Flexion
Definition
To decrease the angle of a joint
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