Answer:
When we exercise the blood capillaries dilate because of the removal of waste products like carbon dioxide from muscles during exercise.
The dilated blood vessels results in the increased blood flow and increased blood flow leads to the delivering of more amount of oxygen to the body muscles and cells during the exercise.
So increased blood flow is necessary for the removal of waste products like carbon dioxide and lactic acid generated during exercise and to deliver the appropriate amount of oxygen to muscles to function properly.
Answer:
1 answer. Never taste food to determine its safety! Be sure to discard any food items in either the freezer or the refrigerator that you won't be cooking and have come into contact with raw meat juices. Partial thawing and refreezing may reduce the quality of some food, but the food will remain safe to eat
2 answer. As the USDA notes in Keeping Food Safe During an Emergency, your refrigerator will keep food safe for up to 4 hours during a power outage. Keep the door closed as much as possible. Discard refrigerated perishable food such as meat, poultry, fish, eggs, and leftovers after 4 hours without power.
Blood in the pulmonary vein is oxygen rich, while in all of the other veins, it is oxygen poor.
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