Dropped my mac. Help

Hello. I apologize for my English, but I have no one else to ask.

I carry my mac in a bag that wears on my shoulder. Yesterday the bag dropped and fell on the asphalt from a height of 1 meter. Visually, the mac was not injured, in terms of work, too. Tell me, how can this fall be dangerous in the future, what should I check? Who had such situations, share information. thank!

Important! It seems the mac has a knock on the body itself when shaking around the battery and trackpad