The scalenus anterior and the scalenus medius all insert into the first rib (the scalenus posterior inserts into the second rib). They originate from cervical vertebrae two to cervical vertebrae seven (C2 - C7). Each of the scalene muscles has several points of origin, which look like fingers from your spine.
Anterior.
Anterior.
The floating ribs
The Sternum, or breastbone.
The sternum and rib cage are medial to the breast.
The clavicle or collar bone.
the heart is medial/proximal to the rib cage
Inferior to the heart: Stomach Superior to the heart: Brain Anterior to the heart: Rib cage Posterior to the heart: Spine Latereral to the heart: Lungs
It is a rib or a riblike part, such as the midrib of a leaf or a thickened anterior vein or margin of an insect's wing.
The strongest protractor of the scapula is the serratus anterior muscle. It originates from the upper ribs and inserts along the medial border of the scapula. Contraction of the serratus anterior muscle pulls the scapula forward around the rib cage.
The coracoid process of the scapula and 2nd thru fifth rib