Anatomy
The gastrocnemius - named from Greek terms meaning the belly, and the calf, because it forms the enlargement of that part of the leg - is double-headed, each head consisting of a fusiform muscle, the lower part of which blends with its fellow so as to form a common tendon of insertion. It forms the femoral origin of the great triceps feurae muscle.
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The rhomboid (latin : Rhomboidei ; french: Muscles Rhomboïdes) named from their shape, which is rhomboidal, or like a parallelogram - are sometimes looked upon as a single muscle, but may be usually separated into the following : Rhomboid minor muscle and Rhomboid major muscle.
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The soleus (french : muscle soléaire) - named from solea, the Latin for a sole-fish, because of the resemblance of the muscle to this flat fish - is a thick, fusiform sheet.
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The trapezius (or cucullaris, as it has been called from its resemblance to a cowl = cucullus ; french : muscle trapèze) is named from τραπέζι, a table, on account of the four-sided figure formed by the muscles of the two sides. It is a fan-shaped sheet forming an obtuse-angled triangle, the long side of which corresponds with the spine.
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The plantaris (french : muscle plantaire) - named from its occasional attachment to the fascia covering the sole of the foot (=planta)- is a fusiform, somewhat flattened muscle with a very long ribbon- shaped tendon.
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The serratus posticus superior muscle (lat: Serratus posticus superior) - named from its saw-like edge and its relation to the other serrati - is a quadrilateral sheet with a toothed outer margin.
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The levator scapula muscle (French : Muscle élévateur de la scapula ; Latin : levator anguli scapulae) , named from its action in raising the posterior superior angle of the scapula, is a ribbon-shaped muscle.
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The pectoralis major (french : muscle grand pectoral) named from its being the larger of the two muscles which arise from the front of the chest (pectus = breast) - is a thick, triangular, fan-shaped sheet ; or, more accurately, it may be likened to the sector of a circle on account of le curved origin, from which all the fibres converge to the upper part of the humerus as a center.
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The latissimus dorsi (french : muscle grand dorsal) - named from its being the broadest of the back muscles - is a fan-shaped sheet forming a right-angled triangle, the right angle being contained between its upper and vertebral borders.
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The serratus anterior muscle (Latin: serratus magnus; French: muscle dentelé antérieur) - named from its serrated or saw-like anterior border and large size - is an irregular quadrilateral sheet curved to the shape of the side of the thorax. Its anterior attached border has a somewhat sinuous curve and arises from the side of the thorax by nine or ten digitations or teeth, which, by their saw-like appearance, give the muscle its name. The muscle may be divided into an upper, middle, and lower part.
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The pectoralis minor (french: muscle petit pectoral) - named from its being the smaller of the two muscles which arise from the front of the chest - is a fan- shaped or triangular sheet, with its inner edge divided into three teeth.
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The subclavius muscle (french: Muscle subclavier) - named from its position beneath the clavicle (=clavis) - is almost cylindrical, but may be more accurately described as a thick sheet of the shape of a low obtuse-angled triangle, the obtuse angle being contained between the clavicular attachment and the inner free border of the muscle.
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The spleen is a large blood-vascular