Answer
Tissues that are metabolically active use oxygen and excrete waste at greater rates than do less metabolically active ( or inactive) tissues. Therefore, the metabolically active tissues require extensive capillary networks to bring them the high levels of oxygen, and great amounts of nutrients that they require to sustain their metabolic activities.
Work Step by Step
Tissues that are metabolically active need adequate amounts of oxygen and nutrients to support their metabolism. They therefore require a rich vascular supply, represented by an expansive capillary network.
