What is one potential effect on the body due to decreased pressure besides breathing difficulties?

One potential effect on the body due to decreased pressure is changes in blood pressure. When pressure decreases, especially in high-altitude environments, the body can experience various physiological changes. As the external pressure drops, the body’s ability to regulate blood pressure can be affected. This might lead to a decrease in the overall volume of oxygen available in the blood, which can in turn alter blood circulation and pressure levels.

In low-pressure situations, the body can struggle to maintain adequate blood flow and oxygen delivery to organs, which can result in additional stress on the cardiovascular system. The body's compensatory responses can lead to alterations in heart rate and blood pressure, potentially resulting in hypo- or hypertension depending on the individual’s state and altitude. This illustrates the interconnectedness of pressure changes and cardiovascular responses, making this option the most relevant to the question.