Yes you can have a heart attack without knowing it.
Answer:
Explanation: There are three main areas of anatomy: gross anatomy deals with organs and organ groupings called systems that are visible to the naked eye; cytology is the study of cell structure; and histology examines the structure of tissues.
B. taking excessive supplements
Answer:
The answer I would put for the first one is agave nectar or honey because they are much healthier and are a lot more natural and still taste sweet.