The heart in any organism is able to pump because an electrical pulse is sent throughout the heart and its contracts. What energy transformation takes place when this happens? Mechanical ® Electrical
Electrical ® Mechanical
Electrical ® Chemical
Mechanical ® Chemical

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Indica el nombre y la fucion de los vasos sanguineos que entran y salen de los riñones

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change