👉 An orthosinus is a type of muscle that is responsible for opening and closing the nasal passages. It is located in the nasal bone, which is part of the skull. The term "orthosinus" refers to the structure or function of this muscle.
👉 An orthosinus is a type of muscle that is responsible for opening and closing the nasal passages. It is located in the nasal bone, which is part of the skull. The term "orthosinus" refers to the structure or function of this muscle.
