What would you see if you peered inside a human small intestine? Here’s a glimpse at its structure, revealing a community of cells with different functions. A biopsy like this is generally very small ...

Nope, this isn’t a small, prickly mammal with a flashy dye job, but a single intestinal epithelial cell. The colorful, hairlike structures are microvilli, which are designed to maximize the cell’s ...