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more ch. 7

more ch. 7 anatomy

Components of the appendicular skeleton arm bones, leg bones, girdles
Functions of the pectoral girdle forms the shoulder, attach arm bones to the axial skeleton
Components of girdles clavicle, scapula
Collar bone (little key) acts as a brace clavicle
Shoulder blade (shovel or blade) scapula
What structure is the funny bone? the ulnae nerve that runs behind medial epicondyle of the humerous
What is the pelvic girdle composed of? hip bones, sacrum, coccyx
Pair of coxal bones hipbones
Joint where coxal bones meet anteriorly pubic symphosis
Joint where each coxal bone meets sacrum posteriorly sacrioiliac joints
What are the functions of the pelvic girdle? form hips, attach leg bones to axial skeleton
Coxal bones consist of 3 fused bones ilium (top), ischium (underneath in back), pubis (anterior)
“vinegar cup” acetabelum
What does the acetabelum hold? head of femur
If acetebelum is improperly formed the bone may slip out of place causing hip dysplasia
What is the ilium composed of? iliac crest, anterior superior iliac spine, greater sciatic notch, obturator foramen
Thickened superior margin of the hip iliac crest
Used to find location for hip injections anterior superior iliac spine
Site where sciatic nerve passes, must be divided greater sciatic notch
Large opening, nearly closed up-few blood vessels and nerves pass through obturator foramen
Structure of pelvis pelvic brim, false pelvis, true pelvis
Imaginary line drawn from sacral promontory to pubic symphosis pelvic brim
Area above pelvic brim, does not constrict during childbirth, front wall muscle false pelvis
Area below pelvic brim, surrounded by bone, size of inlet and outlet must be large enough for baby’s head to pass through true pelvis
Modifications of female pelvis for childbearing wider, shallower, pubic arch 80-90 degrees, true pelvis larger inlet-outlet, sacrum wider
Segmented structure/can only hold weight if arched arches of foot
What are the arches of the foot composed of? bones, ligaments
Strong bands of connective tissue ligaments
Bones and ligaments are arranged into 3 arches 2 longitudinal, 1 transverse
Functions of the arches of the foot distribute body weight, make walking and running more economical, provides strength
Tendons and ligaments are composed of fibrous connective tissue
Usually attach muscle to bone tendons
Collagen fibers of tendon blend with muscle fibers at one end
Parallel collagen fibers are shiny
Bind 2 bones together ligaments
Ligaments are associated with joints
Ligaments limit range of motion stability
Created by: charleen920