Usually: The brain, to begin with. Not a muscle, but full of nerves. Muscle: a band or bundle of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or maintaining the position of parts of the body. For example, your tongue, masseter, and eyelids. Structures that do not have nerves or muscles include hair and nails.
Answered 7/20/2014
4.7k views
A doctor has provided 1 answer
6 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question