Complex sentence: The phrenic nerve arises from the third, fourth, and fifth cervical spinal nerves (C3-C5) in humans, fifth, sixth and seventh cervical spinal nerves (C5-7) in most domestic animals.
Split into simpler sentences: The phrenic nerve arises from the third, fourth, and fifth cervical spinal nerves (C3-C5) in humans. It arises from the fifth, sixth and seventh cervical spinal nerves (C5-7) in most domestic animals.