The pectoralis major is a thick, fan-shaped muscle, situated at the upper front of the chest wall. It makes up the bulk of the chest muscles in the male and lies under the breast in the female. Underneath the pectoralis major is the pectoralis minor, a thin, triangular muscle. [WP,unvetted].

http://purl.obolibrary.org/obo/UBERON_0002381

The pectoralis major is a thick, fan-shaped muscle, situated at the upper front of the chest wall. It makes up the bulk of the chest muscles in the male and lies under the breast in the female. Underneath the pectoralis major is the pectoralis minor, a thin, triangular muscle. [WP,unvetted].

http://purl.obolibrary.org/obo/uberon.owl

pectoralis major

UBERON:0002381

pectoralis major

http://purl.obolibrary.org/obo/UBERON_0001482

http://purl.obolibrary.org/obo/UBERON_0003897

http://purl.obolibrary.org/obo/UBERON_0001495