Answer:
In my opinion, if you feel that using a double mask will make you feel safer, then you should use it, but using a mask is important. Now, if you are already fully vaccinated I don't think you should use a mask unless you want to, which is totally fine.
Explanation:
Answer:
before eating is known as preprandial sample and
after eating is known as postprandial sample
Answer:
Periosteum
Explanation:
peri = around
osteum = bone
In general the outermost layer of many stuctures is named similarly e.g. perineurium = outermost layer of nerves, perimysium = outermost layer of muscle, etc.
