The answer to this is Plan a steady progression of exercise intensity.
THE ANSWER IS D : EPIDEMIOLOGIST GOOD LUCK AND HOPE IT HELPS U
That's history not health
Answer: Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins). The primary function of capillaries is the exchange of materials between the blood and tissue cells.
Explanation: