Fish breathe dissolved oxygen gas (O2) in water using gills, which can extract the oxygen because they have a large surface area (fish also have lower oxygen needs because they're cold-blooded). While humans have experimented with breathing liquids like fluorocarbons that can dissolve enough oxy...
Certain intrauterine devices.Many women use a smallintrauterine device(IUD) for birth control. If your IUD doesn’t have hormones, it may make your periods heavier. Problems related to pregnancy.In rare cases, after sperm and egg meet, the growing ball of cells implants itself outside the ute...