<span>Weight
gain occurs either through intentional or unintentional way. Intentional way of
weight gain is where an individual is over eating or having meals that have
high calories which makes a person obese. The unintentional way of weight gain
is when an individual is experiencing medical problems like urinary problems,
endocrine system problems like hormonal imbalances and the likes, due to
stress, etc. An individual who are having a weight gain problem should consult
a doctor immediately to check the cause of the weight gain and to solve the
problem. </span>
Answer:
iron
Explanation:
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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.
