Answer:
organ
Explanation:
The level of organization that the heart would be classified as is organ. The heart is an organ that is made of cardiac tissue, and cardiac tissue
At the least, once a year.
This can vary between people with certain partners and such. You should test before symptoms appear because usually, once symptoms appear, it is too late to be cured or treated.
Every six months can be frequented and sometimes preferred but is not required. Once a year is the least a person could do to test for STD's.
Hope this helps!
Adoption is legally transferring parental rights to a child from the biological parents to another set of parents.
