Blood in the pulmonary vein is oxygen rich, while in all of the other veins, it is oxygen poor.
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Answer:
That contraceptives such as condoms protect from STD's but not 100% protection from babies. Contraceptives such as the pill or IUD's do not protect against STD's but not completely effective either. Appropriate personal limits may include reducing the amount of sex you have or only doing what you are comfortable with
Explanation:
Contamination of food items by other living organism is known as food contamination. It<span> refers to foods that are spoiled or tainted because they either contain microorganisms, such as bacteria or parasites, or toxic substances that make them unfit for consumption.</span>
