The tongue and the facial muscles are used the most (provided you are not paralyzed, or suffer from a stroke). The heart is commonly used to answer this question, but it is also an organ.
the eye muscles because your eyes move constantly, day and night and they do so intensively
The diaphragm, it is the main muscle used for breathing.
thighs
In the human body, the host used muscle would be the tongue, or facial muscle muscles (provided you are not paralyzed). The most used organ would be the heart.
Your heart
The body's longest muscle is the sartorius. It is a strap-like, narrow muscle which runs from the hip to the knee.The Sartorius is the longest muscle in the human body.The longest muscle in the human body is the Sartorius.It is a strap-like, narrow muscle which runs from the hip to the knee.The sartorius muscle, a muscle running down the anterior thigh.sartorius muscleThe Sartorius. It runs diagonally from the outer (lateral) hip to the inner (medial) knee.The longest muscle in the body would be the sartoriusThe Sartorius muscle - the longest muscle in the human body - is a long thin muscle that runs down the length of the thigh.The Satoriusthe Sartorius muscle. It runs diagonally from your outer (lateral) hip to your inner (medial) knee.Sartorius, with origin at the ASIS, and insertion at the medial condyle of the tibia.The Sartorius muscle - the longest muscle in the human body - is a long thin muscle.the longest muscle in the human body is the sartoriussartoriussartoriusThe Sartorius muscle.
The myocardium, or heart, is the most used muscle in the body.
cardiac muscle is only found in the heart so it is used constantly but it isn't the most common muscle found in the body, this would be skeletal muscle.
The heart, as it is a four-cambered muscle that continuously (we hope!) pumps blood round the body.
your deltoids is the muscle in your shoulder that you use in just about EVERY Olympic sport! it is essential to the human body
Carbohydrates relate to the human body by creating the energy the body needs to move.
Plutonium is not used in the human body.
Used as building blocks for protein