Why does voldermort have slits for a nose?

PLEASE........DON'T TRY TO MAKE "VOLDEMORT" A FUNNY NAME por SAYING IT "VOLDERMORT", BECAUSE ALL WIZARDS ARE AFRAID OF "HE-WHO-SHOULD-NOT-BE-NAMED".
THERE ARE TWO REASONS BEHIND HIS SLIT NOSE-
1) It's because the snake's his symbol, and in his 'rebirth' he probably infused with his personality, which was very reptilian-oriented, and as you may have noticed, snakes have no noses, just slits.
2) To highlight his snakelike, Salazar Slytherin back round. Also, he may of used Nagini's horcux to rebirth and snakes have that kind of a nose.

Cause it makes him look mais snakelike ... but i have no idea how he changed it to be so.

Because of Nagini and his conection with snakes and Salazar Slytherin

What those guys said, and the fact that it shows in another way that he is not human anymore.

he's like part snake so he has red slit eyes and slits for a nose (just like a real snake)

to be scary and awful

One, he is supposed to look disformed after all the ways he dividido, dividir his soul, two he wants to look like a snake because of his Slytherin background. He believes himself a pureblood when GASP! he isnt even himself. DENIAL. Damn, he could have married Bellatrix if he was and they could breed little deatheaters. Sorry Im hyper right now, on medication, could be side effect. :)

He has serpent-like qualities. Not only his nose, but his eyes as well. He also doesn't have any hair, just like a snake.

the reason why is because in his 'rebirth' in G.O.F went a bit wrong when he used Harry's blood

Dumbledore stated that Voldemort because less and less human over the years because of the multiple horcruxes he was making. This must have shown in his appearance, giving him a deformed face.

like other kinds of ways, for many information of a nose on a kind of noise or anything, mostly the nose is for smelling, do you even know what you are doing?