Final answer:
The spermatic cord is covered by three layers: the external spermatic fascia, cremaster muscle and fascia, and the internal spermatic fascia, each derived from different layers of abdominal musculature.
Step-by-step explanation:
The coverings of the spermatic cord include the external spermatic fascia, derived from the external oblique muscle. Below it lies the cremaster muscle and fascia, from the internal oblique muscle. Innermost is the internal spermatic fascia, derived from the transversalis fascia. These coverings protect the cord and play a role in temperature regulation necessary for sperm production.