Explanation:
•May help you live longer.
•Keeps skin, teeth, and eyes healthy.
•Supports muscles.
•Boosts immunity.
•Strengthens bones.
•Lowers risk of heart disease, type 2 diabetes, and some cancers.
•Supports healthy pregnancies and breastfeeding.
•Helps the digestive system function.
Answer: Certain pathogens enter and multiply within the human body.
Explanation:
Infection or invasion of a pathogen inside the body of the human host does not necessary causes the disease. Instead the multiplication and colonization of these pathogens inside the body of the human host is responsible for disease. This is because of the fact that the pathogen's cells multiply and invade the healthy cells of the human host. This process weaken up the host immune system. This process leads to the occurrence of signs and symptoms of the disease.
Answer:
Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart. The oxygen-poor blood enters the right atrium (RA), or the right upper chamber of the heart.
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