External oblique. /various forward movements
Internal oblique. \ of trunk
Rectus abdominis. compresses abdominal viscera and acts upon
pelvis.

Upper Limbs.

Deltoid. carries arm outwards and upwards.
Biceps. flexes elbow and raises arm.
Triceps. extends the forearm.
Brachialis anticus. flexor of elbow.
Supinator longus. flexes the forearm.
Flexor carpi radialis. flexors of wrist.
Flexor carpi ulnaris. " " "

Lower Limbs.

Gluteus maximus. adducts the thigh.
Adductors of thigh. draw the leg inwards.
Sartorius. crosses the legs.
Rectus femoris. flexes the thigh.
Vastus externus. extensor of leg.
Vastus internus. extensor of leg upon thigh.
Biceps femoris. flexes leg upon thigh.
Gracilis. flexes the leg and adducts thigh.
Tibialis anticus. draws up inner border of foot.
Peroneus longus. raises outer edge of foot,
Gastrocnemius. keep the body erect, and
Soleus. aid in walking and running.

Chapter IV.

Physical Exercise.

80. Importance of Bodily Exercise. Nothing is so essential to success
in life as sound physical health. It enables us to work with energy and
comfort, and better to endure unusual physical and mental strains. While
others suffer the penalties of feebleness, a lower standard of functional
activities, and premature decay, the fortunate possessor of a sound mind
in a sound body is better prepared, with proper application, to endure the
hardships and win the triumphs of life[13].

This element of physical capacity is as necessary to a useful and
energetic life, as are mental endowment and intellectual acquirement.
Instinct impels us to seek health and pleasure in muscular exercise. A
healthy and vigorous child is never still except during sleep. The
restless limbs and muscles of school children pent up for several hours,
feel the need of movement, as a hungry man craves food. This natural
desire for exercise, although too often overlooked, is really one of the
necessities of life. One must be in ill health or of an imperfect nature,
when he ceases to feel this impulse. Indeed, motion within proper bounds
is essential to the full development and perfect main