Answer:
It is normal for there to be veins visible underneath the tongue, partly because the mucous membrane is so thin and translucent in this region, but where these vessels become dilated and tortuous, they may appear round and black like caviar.
Answer:
roller hockey,
Explanation:it is a type of hockey played on land on roller skates.It also has different rules.
Active immunity
Active immunity is when something triggers an immunity system to produce antibodies, this something being a vaccine. Hope this helps!
Answer:
1. aneamia
2.he should eat food rich in the mineral iron
