Rectus is a Latin word that means straight. This means that the muscle is usually straight, as in the rectus abdominis.
Tricep.
rectus femoris
This is untrue. Gay people have muscle in the same percentages as straight people.
It is called cardiac muscle, or myocardium.
Your heart is a muscle. It is also called the myocardium. The muscle cells in the heart muscle are called myocardiocytes.
It is called involuntary muscle or smooth muscle.
A single muscle cell is called a muscle fiber.
Bones will not cause the arm to be in a straight position, instead, muscle and tendons will cause the arm to be straight.
Your thigh muscle is called your Quadricep.
Rectus abdominis
One type of muscle is called smooth muscle. A smooth muscle works involuntarily. The other type of muscle is called skeletal muscle. Skeletal muscle only works with a command.