Question: What is a concubine? Why did God allow men to have concubines in the Bible? Answer: A concubine is a female who voluntarily enslaves and sells herself to a man primarily for his sexual pleasure. Concubines in the patriarchal age and beyond did not have equal status with a wife.
The type of muscle that is voluntary and striated is skeletal muscle. This type of muscle has a banded appearance called striations. The peripheral nervous system controls skeletal muscle.
The three main types are skeletal muscle, smooth muscle, and cardiac muscle. Skeletal muscle has a striped appearance earning its other name striated muscle. It is designed to work at a moments notice but it tires easily. Smooth muscle is not striped. It is designed to work slowly so therefore it tires slowly.