They have special nose lids.
Camels By The Lovely Woodlands School, Basildon
To help keep the sand out
Camels are NOT threatened. They are not even close. So, the answer is NO. Camels ARE NOTthreatened.
Same way you close your bum.
Yes
they have thicker skin so the desert temperature changes do not affect them
Two nostrills
beeswax
on opposite sides of it's head.
To prevent sand entering into their nose
no. Even camels need to breathe, despite their ability to close their nose with flaps.
Camels have specialized muscles that allow them to close their nostrils. This is an adaptation that to prevents them from inhaling sand.