En los animales, el sistema circulatorio no es complemento del respiratorio ya que el intercambio de gases se realiza independientemente del transporte de sustancias. ¿Qué características tiene el sistema circulatorio de los organismos que presentan esta particularidad?

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .