Por que el transporte de oxigeno es más eficiente en los sistemas circulatorios cerrados? Why is oxygen transport more efficient in closed circulatory systems?

The closed circulatory system considerably enhances the speed, precision, and efficiency of the circulation. The blood flows far more rapidly and it takes less time to circulate through the closed system and return to the heart.

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.