ulna
Pinky-side arm bone
The ulna is the longer of the two bones in the forearm, running from the elbow to the wrist on the side opposite the thumb.
It forms the point of the elbow and works alongside the radius to allow the forearm to rotate.
She fractured her ulna in the fall.
Center-to-perimeter distance
- humerusUpper arm's long bone
- olecranonProximal ulnar process
- coronoidShaped like crow's beak
- shaftNarrow vertical passage
epiphysis · articulation · synovial · joint · elbow · wrist · carpals · proximal
Split in hard material
- dislocationForced out of position
- osteoporosisDisease weakening skeletal structure
- osteomyelitisBacterial infection of skeleton
- splintDevice immobilizing injured limbs
cast · reduction · X-ray · radiograph · bone density · healing · callus · orthopedic
Three-headed arm muscle
- brachialisElbow flexor muscle
- supinatorForearm rotation muscle
- originStarting point or source
- insertionPlacing something within
tendon · ligament · attachment · flexion · extension · pronation · supination
Center-to-perimeter distance
clavicle · long bone · weight-bearing · lever · skeletal system · appendicular · mammalian · vertebrate
Hollow core of long bones
- spongy bonePorous inner bone structure
- bone marrowBlood cell birthplace
- periosteumFibrous bone covering
- collagenStructural body protein
calcification · mineralization · osteoblast · osteocyte · lamellae · ossification
radius
Center-to-perimeter distance
shaft · epiphysis · articulation · synovial · joint · elbow · wrist · carpals · proximal · distal
fracture
Split in hard material
- dislocationForced out of position
- osteoporosisDisease weakening skeletal structure
- osteomyelitisBacterial infection of skeleton
splint · cast · reduction · X-ray · radiograph · bone density · healing · callus · orthopedic
triceps
Three-headed arm muscle
- brachialisElbow flexor muscle
- supinatorForearm rotation muscle
- originStarting point or source
insertion · tendon · ligament · attachment · flexion · extension · pronation · supination
radius
Center-to-perimeter distance
femur · clavicle · long bone · weight-bearing · lever · skeletal system · appendicular · mammalian · vertebrate
medullary cavity
Hollow core of long bones
- spongy bonePorous inner bone structure
- bone marrowBlood cell birthplace
- periosteumFibrous bone covering
collagen · calcification · mineralization · osteoblast · osteocyte · lamellae · ossification
- orthopedicsorthopedic surgeon, orthopedic surgery, bone fracture, joint replacement, hip replacement
- body partsarm, leg, hand, back, chest
- anatomybrain, heart, bones, liver, stomach
- bonesskull, femur, tibia, skulls, humerus
- musculoskeletalbone, bones, muscle, muscles, joint
- skeletal systemskull, femur, tibia, fibula, humerus