QUIZ I PART II Flashcards
- usually have greater length than width
- found in the limbs
- slight posterior/plantar concavity (curvature) in the lower limb for strength
ex. Femur, tibia, fibula, metatarsal bones, phalanges
Long Bones
- the central tubular part
- primarily compact bone
Diaphysis/Shaft/Body
- the hollow core in the diaphysis
- contains bone marrow
Medullary Cavity
- the ends of the bone
- core of cancellous bone with a thin covering of compact bone, areas of articulation are covered with cartilage
- epiphysis is singular
Epiphyses
- (Epiphyseal Plate / Growth Plate)
- joins epiphysis to metaphysis
- physis is singular
Physes
- flared part between the diaphysis and the epiphyses
- core of cancellous bone with a thin covering of compact bone
- location where bone accumulates thereby increasing the length of the bone
- metaphysis is singular
Metaphyses
- roughly cube-shaped
- found only in the carpus and tarsus
- core of cancellous bone with a thin covering of compact bone
ex. cuboid and cuneiforms
Short Bones
- complex shapes with varying amounts of cancellous and compact bone
ex. vertebrae and facial bones
Irregular Bones
- two parallel plates of compact bone with a minute amount of Cancellous bone between the two plates
ex. ribs and skull
Flat Bones
- round or oval bones located within tendons or joint capsules
- functions:
1. protect the tendon from wear
2. create a mechanical advantage for the muscle by changing the angle
of the pull and altering the muscle action
ex. patella - largest sesamoid in the body,
and the sesamoids of the first metatarsal bone
Sesamoid Bones
- small bones with smooth regular edges
- may be a non-fused portion of an existing bone or an extra bone
- may be located within joint capsules ex. os intermetatarseum (between the metatarsal bases) and os supratalare
- many in the foot
Accessory Bones / Accessory Ossicles
- an opening (hole) for the passage of vessels
and nerves ex. nutrient foramen, sacral foramina
Foramen (foramina)
- a ditch-like furrow for the passage of soft tissue structures
ex. obturator groove, lateral malleolar sulcus
Sulcus, Groove (sulci)
- a depression in or on a bone
ex. iliac fossa, lateral malleolar fossa
Fossa (fossae)
- an indentation along the edge of a bone
ex. greater sciatic notch
Notch
- a large rounded or depressed articular prominence
ex. medial femoral condyle
Condyle
- a small prominence superior to a condyle
ex. medial epicondyle of the femur
Epicondyle
- a small rounded prominence for the attachment of soft tissue structures
ex. adductor tubercle of the femur
Tubercle
- a large rounded prominence, often roughened for the attachment of soft tissue structures
ex. tibial tuberosity
Tuberosity
- a large blunt process only on the femur
ex. greater trochanter
Trochanter
- a prominent border or ridge
ex. median sacral crest
Crest
- a ridge, much less prominent than a crest ex. soleal line of the tibia
Line, Ridge
- all lower extremity bones begin as cartilage except the tufts (distal ends) of the distal phalanges
- the tuberosity of the distal phalanges ossify through a process called intramembranous ossification
- the ossification process from cartilage to bone is called endochondral bone formation or intracartilaginous ossification
Ossification
- the tuberosity of the distal phalanges ossify through a process called
intramembranous ossification
- the ossification process from cartilage to bone is called
endochondral bone formation or intracartilaginous ossification
- at midshaft of the bone
- Primary ossification centers of all of the lower limb long bones are present at birth.
- forms the major part of the diaphysis
Primary Ossification Center of the long bones
- in the extremities (ends)
- may be present at birth
- one or more for each extremity
- form the epiphyses
Secondary Ossification Centers of the long bones
- area of cartilage between the diaphysis and the epiphyses
- allows for length-wise growth of bone
- form the metaphyses and part of the diaphysis
Epiphyseal Plate/Physis of the long bones