כֹּהֲנִים (kohanim, priests) have a special status of קְדֻשָּׁה (kedushah, holiness). They need to be careful to stay טָהוֹר (tahor, pure) in order to work in the mishkan and to eat תְּרוּמָה (terumah), which are food gifts for kohanim.
Kohanim can’t come in contact with dead bodies, other than their immediate relatives.
Certain animals can't be sacrificed in the mishkan based on the physical shape they are in. There are certain physical characteristics which prevent kohanim from performing the service in the mishkan.
Kedushah also exists in time. The Torah describes these מִקְרָאֵי קֹדֶשׁ (mikra’ei kodesh, holy occasions):
Shabbat
Pesah
Shavuot
Rosh Hashanah
Yom Kippur
Sukkot
The Torah provides more details about the mishkan: how to light the מְנוֹרָה (menorah) and how to prepare the bread for the שֻׁלְחָן (shulhan, table).
Someone in the camp of Benei Yisrael curses God! His punishment is death.
