What bones are associated with the axial skeleton?
The axial skeleton forms the central axis of the body and includes the bones of the skull, ossicles of the middle ear, hyoid bone of the throat, vertebral column, and the thoracic cage (ribcage) (Figure 1).
What are the 3 main parts of the axial skeleton?
The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate animal, including humans. The primary divisions of the skeleton system are the head, thorax, and vertebral column.
Which of the following is a part of the axial division of the skeletal system?
The axial skeleton supports the head, neck, back, and chest and thus forms the vertical axis of the body. It consists of the skull, vertebral column (including the sacrum and coccyx), and the thoracic cage, formed by the ribs and sternum. The appendicular skeleton is made up of all bones of the upper and lower limbs.
What is the name of the joint that connects the axial skeleton to the pectoral girdle?
What is the difference between pectoral and pelvic girdle?
The pelvic girdle is formed of paired hip bones each made up of ilium, ischium and pubis. The pectoral girdle is part of the appendicular skeleton which are for the upper limbs. In human beings, the pectoral girdle consists of the scapula and the clavicle. The pelvic girdle is located in the lower part of the trunk.
What is the ball in your shoulder called?
The glenohumeral joint is what most people think of as the shoulder joint. It’s the major joint in the shoulder, where the rounded top, or head, of the humerus, nestles into a rounded socket of the scapula, called the glenoid. This ball-and-socket construction allows for circular movement of the arm.
What is the area between your neck and shoulder called?
Description. The trapezius is a broad, flat, superficial muscle extending from the cervical to thoracic region on the posterior aspect of the neck and trunk. The muscle is divided into three parts: descending (superior), ascending (inferior), and middle.
What is the ball and socket joint in the shoulder called?
The glenohumeral joint is the one most people think of as the shoulder joint. It is formed where a ball (head) at the top of the humerus fits into a shallow cuplike socket (glenoid) in the scapula, allowing a wide range of movement.
What are the four shoulder joints?
Four joints are present in the shoulder: the sternoclavicular (SC), acromioclavicular (AC), and scapulothoracic joints, and glenohumeral joint.
What type of synovial joint is the shoulder?
What are the least movable joints?
- synovial fluid.
- Pivot joint.
- least movable joint.
- friction-free movement.
Which structure attaches a muscle to bone and helps stabilize a synovial joint?
Which structure attaches a muscle to bone?
What controls the movement of synovial fluid through cartilage?
Collagen fibers are important components of the cartilage matrix because they anchor the cartilage securely to underlying bone. Only proteoglycans give articular cartilage its stiff quality and regulate the movement of synovial fluid through the cartilage.
What helps stabilize synovial?
Joints are cushioned by small fluid-filled sacs called bursae and stabilized by tough bands of fibrous connective tissue called tendons.
What factors affect the range of motion at synovial joints?
Factors contribute to keeping the articular surfaces in contact and affect range of motion:
- Structure or shape of the articulating bones.
- Strength and tension of the joint ligaments.
What are the factors that can limit the range of motion at a joint?
Other causes of restricted range of motion include:
- inflammation of the soft tissues surrounding the joint, or joint swelling.
- muscle stiffness.
- joint dislocation.
- elbow fractures.
- fractures in other areas of the body.
What factors affect joint stability?
There are three main factors that contribute to joint stability:
- Size, shape, and arrangement of the articular surface: The articular surface is the connection of two bones.
- Ligaments: All joints are surrounded by ligaments, which are connective tissues that hold a joint together.
Which three factors contribute to the range of motion at a joint?
- weight of limb.
- object being moved.
- opposing muscle tension.