- April 28, 2026The eleventh and twelfth ribs are floating ribs with no anterior cartilaginous connection — they articulate only with the corresponding…
- April 28, 2026The clavicular head of the pectoralis major is the upper portion of the fan-shaped pectoral muscle, providing the primary force…
- April 28, 2026The sternocostal head is the larger and more powerful component of the pectoralis major, providing the primary force for arm…
- April 28, 2026The external intercostal muscles fill the intercostal spaces from the vertebral column to the costochondral junctions with fibres directed obliquely…
- April 28, 2026The internal intercostal muscles run opposite to the external intercostals, with fibres directed downward and backward from the superior rib…
- April 28, 2026The diaphragm is the primary muscle of breathing, a domed musculotendinous partition separating the thorax from the abdomen. Its descent…
- April 28, 2026The subclavius is a small muscle running parallel to the clavicle from the first costochondral junction to the inferior clavicle.…
- April 28, 2026The serratus anterior is a broad, saw-toothed muscle wrapping around the lateral chest wall and connecting eight ribs to the…
- April 28, 2026The pectoralis major is a large, fan-shaped muscle that spans the front of the upper chest, divided into a clavicular…
- April 28, 2026The pectoralis minor is a thin, triangular muscle that lies completely underneath the pectoralis major, connecting the front of the…