Tap it, learn it, then prove it. Build a streak and dare your friends to beat it.
The adult skeleton has 206 bones. Drag to spin the 3D skeleton, pinch or scroll to zoom, and tap any bone to see its type, job and a memory hook.
Tap any bone on the figure to see what it does.
A joint is where two or more bones meet. Press "Move it" to see the range of movement each type allows.
Tap a part to learn its job. Joints like the knee, hip and shoulder are all synovial.
Tap a part of the joint: cartilage, fluid, membrane, capsule, ligament, tendon or the bone ends.
Skeletal muscles pull on bones through tendons. Muscles can only pull, so they work in pairs. Spin the body to see the front and back muscles.
Move the slider or press a button. The muscle that contracts is the agonist. The one that relaxes is the antagonist.
Drag the slider or press a button.
Extra topics for this level. Tap bones and muscles on the other tabs for origins, insertions and more detail, and use the Quiz tab for level questions.
Answer a few questions every day to keep your day streak alive. Your scores are saved on this device.