Yes, VENTRAL is a Scrabble word!

Letter values in Scrabble US: V 4, E 1, N 1, T 1, R 1, A 1, L 1.

Is it a valid word?

VENTRAL is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

toward or on or near the belly (front of a primate or lower surface of a lower animal)
nearest to or facing toward the axis of an organ or organism