Rectus is a Latin word that means straight. This means that the muscle is usually straight, as in the rectus abdominis.
The layman's term for the rectus femoris is the "thigh muscle." It is one of the four muscles that make up the quadriceps group, located at the front of the thigh, and is primarily responsible for extending the knee and helping with hip flexion.
oblique
The Latin word for straight (in the sense of not curved) is rectus or directus.
what is the scientific name for forearm
Intramuscular
The prefix bi- will be in front of the muscle name. For example bicep.
The term for the 4 sections of the heart muscle is the cardiac muscle.
Rectus abdominis is another term for the "six pack" muscles. These muscles respond very well to specific activities. Sit-ups, push through, and crunches will all help develop your rectus abdominis muscles.
The anatomical term for the calf muscle is the gastrocnemius muscle.
It tells you the number of origins. "When biceps, triceps, or quadriceps forms part of a muscle's name, you can assume that the muscle has two, three, or four origins, respectively. For example, the biceps brachii muscle of the arm has two origins, or heads."- Human Anatomy & Physiology. Eighth Edition. Elaine N. Marieb page 321
Another name for the human heart is a cardiac muscle.
Generally Muscle Atrophy is the term used when your muscles start to waste or you lose muscle. This can happen when muscle is starved or if you have illnesses such as Cancer or AIDS - even if you stop using muscles.