Acute exposure to high altitude can affect the cardiovascular system by decreasing oxygen in the blood (acute hypoxia). It also increases demand on the heart, adrenaline release and pulmonary artery pressures.
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Acute hypothermia is caused by prolonged exposure to a cold environment. Hypothermia results when the internal body temperature drops below normal limits.
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Answer:The immune system is a network of cells, tissues and organs that work together to attack pathogens that try to invade your body. Bacteria, parasites and fungi that may cause infection meet a system of immune soldiers, including T-lymphocytes, macrophages and neutrophils.
Explanation:
The answer would be D because the proportion is 6:9, which could be simplified to 2:3
