What are those lines inbetween your mouth and nose?

Question

What are those lines inbetween your mouth and nose?

Answer 1

yeah, jusdain is right... :)

Answer 2

The lines, together, are referred to as the "philtrum"

Answer 3

The philtrum (Greek philtron, from philein, "to love; to kiss"), also known as the infranasal depression, is the vertical groove in the upper lip, formed where the nasomedial and maxillary processes meet during embryonic development.

The philtrum allows humans to express a much larger range of lip motions than would otherwise be possible, which enhances vocal and non-verbal communication.