🦴 Skeletal System
Learn the bones and key structures of the human skeletal system.
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📖 16 words
Femur
Femur
The thigh bone — the longest and strongest bone in the human body.
The femur runs from your hip to your knee.
Tibia
Tibia
The larger of the two lower-leg bones; the shinbone.
You can feel your tibia along the front of your lower leg.
Fibula
Fibula
The thin bone running alongside the tibia in the lower leg.
The fibula helps stabilize the ankle joint.
Radius
Radius
The shorter forearm bone on the thumb side.
The radius rotates around the ulna when you turn your palm.
Ulna
Ulna
The longer forearm bone on the pinky side; forms the elbow point.
The ulna forms the point of your elbow, called the olecranon.
Clavicle
Clavicle
The collarbone; connects the shoulder blade to the sternum.
The clavicle is one of the most commonly broken bones.
Scapula
Scapula
The shoulder blade; the flat triangular bone at the back of the shoulder.
The scapula anchors many muscles used for arm movement.
Sternum
Sternum
The breastbone; the flat bone in the center of the chest that connects the ribs.
Doctors press on the sternum during CPR.
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Patella
Patella
The kneecap; the small, triangular bone at the front of the knee.
The patella protects the knee joint.
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Cartilage
Cartilage
The firm but flexible tissue that cushions joints and gives shape to ears and nose.
Cartilage in your knee absorbs shock when you run.
Skull
Skull
The bony case that surrounds and protects the brain.
Your skull protects your brain like a helmet.
Spine
Spine
The column of 33 vertebrae that runs down the back; the backbone.
The spine lets you stand upright and bend forward.
Humerus
Humerus
The upper arm bone, running from the shoulder to the elbow.
The humerus connects the shoulder blade to the elbow.
Pelvis
Pelvis
The basin-shaped ring of bones at the base of the spine that connects the legs to the upper body.
The pelvis supports the organs in your lower abdomen.
Mandible
Mandible
The lower jawbone; the only movable bone in the skull.
You move your mandible every time you speak or chew.
Rib
Rib
One of the 12 pairs of curved bones that form the rib cage and protect the heart and lungs.
You have 24 ribs arranged in 12 pairs.
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