An artificial heart has been altered by man in some way. Like if they had a valve replaced it becomes artificial.
Universe, galaxy, solar system, star, planet, moon
The answer is (A) wave action .
Tissue damage activates nociceptors or pain receptors in the skin. A signal is sent to the peripheral nerve to the spinal cord where neurotransmitters or chemical messengers are released. It activates other nerves to pass signal to the brain. The signals are relayed to the somatosensory cortex for sensation, frontal cortex for thinking and limbic system for emotional response.
common descent means the evolutionary in biology and how they have something linked with their common ancestors.
