👉 A capsuliform is a type of muscle in mammals, specifically in birds. It is characterized by its ability to contract and relax, which allows it to help with breathing by facilitating air passage through the lungs. Capsular muscles are found mainly in the chest cavity (chest wall) and can be divided into two main types: the pericardial (or cavum) muscle and the pericentral (or cavum pleurae) muscle. The pericardial muscle is
