Question

Какие мышцы прикрепляются к костям только одним концом? а) мимические;б) мышцы живота;в) жевательные;г) мышцы спины.

Answer 1

Muscles that attach to bones at only one end

There are several muscles in the human body that attach to bones at only one end. These include:

а) Mimetic muscles: Mimetic muscles are the muscles responsible for facial expressions. They attach to the bones of the face and skull at one end and to the skin or other muscles at the other end. Examples of mimetic muscles include the orbicularis oculi, which closes the eyelids, and the zygomaticus major, which raises the corners of the mouth.

б) Abdominal muscles: The abdominal muscles, such as the rectus abdominis and the external oblique, attach to the bones of the ribcage and pelvis at one end. These muscles play a role in trunk flexion, rotation, and stabilization.

в) Jaw muscles: The muscles responsible for chewing, known as the masticatory muscles, attach to the bones of the skull and jaw at one end. These muscles include the masseter, temporalis, and medial pterygoid muscles.

г) Back muscles: The muscles of the back, such as the latissimus dorsi and the erector spinae, attach to the bones of the spine, pelvis, and ribs at one end. These muscles are involved in movements such as extension, flexion, and rotation of the spine.

It is important to note that while these muscles attach to bones at one end, they may have other attachments to other muscles, tendons, or ligaments at the other end.