MrBadmusAI

Year 7 · Spring First Half

Biology

3 lessons from 1 unit.

Unit B2 · lessons 1 to 3 of 4

Movement: skeleton and muscles

Bone is not the dead scaffolding it looks like in the corner of a lab. It is living tissue that rebuilds itself around the forces you put through it, it makes your blood, and it is the only thing your muscles have to pull against.

  1. 01What the skeleton doesSystemA broken finger is an inconvenience. A broken rib makes every breath hurt. Same material — so what makes the difference?Open this lesson
  2. 02JointsModelShoulders dislocate all the time. Elbows almost never do. What is the shoulder buying with that risk?Open this lesson
  3. 03Antagonistic muscle pairsSystemEvery muscle you own can do exactly one thing. So how does an arm come back?Open this lesson

Back to all three sciences this half term The whole KS3 Biology course