The answer is respiratory and circulatory systems.
And the peripheral nervous system
Liver
Thyroid gland
Spleen
Researchers have concluded that there is a link between _______ physical activity with the risk of heart attack and sudden cardiac death within one to two hours following the activity.
Out of all the answers shown above the one that completes and makes the statement shown above true is answer choice B) vigorous-intensity.
I hope it helps, Regards.
