Muscle of the week - Pectoralis Major and Minor
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Physical Ed
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6th - 12th Grade
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Muscle of the week - Pectoralis Major and Minor
your chest muscles!
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Pectoralis Major
The pectoralis major extends across the upper part of the chest and is attached to a ridge at the rear of the humerus (the bone of the upper arm).
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Pectoralis Minor
The pectoralis minor lies, for the most part, beneath the pectoralis major, arising from the middle ribs and inserting into (attaching to) the scapula (shoulder blade).
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Pectoralis Major cont.
primary functions are flexion, adduction, and internal rotation of the humerus. The pectoral major may colloquially be referred to as "pecs", "pectoral muscle" or "chest muscle" due to it being the largest and most superficial muscle in the chest area.
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PECTORALIS MINOR
Together with other muscles of the region it produces various movements of the scapula and can be used as an accessory muscle of respiration.
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Muscle of the week - Pectoralis Major and Minor
your chest muscles!
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