Pectoral muscle and Skeletal muscle

Pectoral muscle noun - Either of two large muscles of the chest.

Skeletal muscle and pectoral muscle are semantically related. In some cases you can use "Skeletal muscle" instead a noun phrase "Pectoral muscle".

Skeletal muscle noun - A muscle that is connected at either or both ends to a bone and so move parts of the skeleton; a muscle that is characterized by transverse stripes.

Pectoral muscle and skeletal muscle are semantically related. Sometimes you can replace phrase "Pectoral muscle" with "Skeletal muscle", this phrases are similar.