In vertebrates, the skeleton of different regions of the body ... nervous system. The precursor cells of the spine and ribs are somitic mesoderm cells, which arise from the sides of the embryo's back ...

In vertebrates, the skeleton of different regions of the body arises from different precursor cells. Researchers have now discovered that these skeletal cells do not just differ in their developmental ...

Skeletal muscles work in pairs to move the ... This clip could be used as part of body systems topic to illustrate the function of the biceps and triceps. Students could label a diagram of the ...

From the skull to the smallest bone in your pinky toe, the skeleton acts as internal scaffolding to give stability to the body, and forms protective cocoons around important organs. Despite their ...