Organisms start from one cell, which divides, again and again, building 3D tissues into a body. Epithelial cells form linings, like the skin and outer layers of organs, and lay the foundation for ...

When you purchase an independently reviewed book through our site, we earn an affiliate commission. “Girls can’t do Euclid: can they, sir?” “The Mill on the Floss” contains one of George Eliot’s ...