The muscle is a soft tissue found in most animals. The cells in the
muscle contain protein that produces a contraction that changes both the length
and shape of the cell. They are responsible for the movement it produces in the
human body. There are three types of muscle cell: skeletal, cardiac and smooth
muscle. Cardiac muscle contains excess amounts of mitochondria and myoglobin. The
myoglobin is responsible for the red color of the muscle. The answer is letter
B.
