There are 23 Major Muscles.
You have 600 muscles in your body and half of them are major muscles
There are 16 major muscles groups in your typical house cat and they have about 500 muscles but i don't know for sure if that's the exact number.
The chest muscles primarily consist of two major groups: the pectoralis major and the pectoralis minor. The pectoralis major is a large muscle responsible for the bulk of the chest, while the pectoralis minor is smaller and lies beneath it. Together, these muscles facilitate movements of the shoulder and arm. Additionally, there are supportive muscles, such as the serratus anterior, that contribute to chest function.
Three major muscles in the back are the trapezius, latissimus dorsi, and the spinal erectae.
Three muscles attach to the lesser tubercle of the humerus: subscapularis, teres major, and the supraspinatus.
Many muscles are no where near it like my toe, leg, heart, etc.
Sternocleidomastoid muscles
There are two muscles that are in your chest. These two muscles are known as the pectorals major and the pectorals minor.
The Pectoralis Major (large superficial) and Pectoralis Minor
yes .
glutes
A butterfly has around 6 major muscles in their thorax that help control their wing movement. These muscles are responsible for the delicate flapping and gliding motions that butterflies use for flight.