Answer:
Mammography is an X-ray of the breast. It's a screening tool used to detect and diagnose breast cancer.
I looked it up :)
Answer:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.
If this is a true or false question the answer is true
People were not careful and wanted to take the selfie to show people that they did something cool. Mainly just to brag on the internet or feel righteous about themselves. Also by not taking the correct precautions
SNOWBOARDING, ROCKCLIMBING, FREE DIVING
