Epithelial tissue forms the outermost protective barrier of tissues and organs and is therefore prone to wounds and injuries.

But the confusion between convex and concave due to the angle of the light speaks to the broader computational challenges our brains face on a daily basis.

A spherical mirror is that mirror whose reflecting surface is the part of a hollow sphere of glass. Spherical mirrors are of two types: concave and convex mirrors.

This paper examines properties and interrelations of several concepts of generalized concavity. It shows that the class of functions that are both 'generalized concave' and 'generalized convex' is ...

When a wound on the skin creates a gap, the epithelial cells of the skin, surrounding the wound, move in a concerted fashion ...