What are the bones of the shoulder girdle?
The three bones which form the shoulder girdle are the clavicle, scapula, and the humerus. This scapula is an attachment site for muscles which support movement and stabilisation of the shoulder. It sits at the back of the shoulder, over the 2nd – 7th ribs and is tilted forwards by an angle of 30°.
Is the shoulder girdle superior or inferior appendicular?
Shoulder Girdle. The pectoral girdle and bones of the free part of the upper limb form the superior appendicular skeleton, while the pelvic girdle and bones of the free part of the lower limb form the inferior appendicular skeleton.
What are the anatomical joints of the pectoral girdle?
the sternoclavicular joints anteriorly, which is an anatomical connection between the pectoral girdle and the axial skeleton; two other anatomical joints called the acromioclavicular and glenohumeral joints, both lying laterally;
What is the anatomy of the shoulder?
The anatomy of the shoulder consists of the shoulder joint and shoulder girdle. Both work together to produce normal movements. The shoulder is a complex joint with high mobility but a lack of stability. Here we explain the basic anatomy of the shoulder.
Are girdle bones part of the axial skeleton?
The axial skeleton includes the bones that form the skull, laryngeal skeleton, vertebral column, and thoracic cage. The bones of the appendicular skeleton (the limbs and girdles) “append” to the axial skeleton.
Does axial skeleton includes shoulder and hip girdles?
human bone structure These are (1) the axial, comprising the vertebral column—the spine—and much of the skull, and (2) the appendicular, to which the pelvic (hip) and pectoral (shoulder) girdles and the bones and cartilages of the limbs belong.
What skeleton is the shoulder girdle part of?
appendicular skeletonThe shoulder girdle or pectoral girdle is the set of bones in the appendicular skeleton which connects to the arm on each side. In humans it consists of the clavicle and scapula; in those species with three bones in the shoulder, it consists of the clavicle, scapula, and coracoid.
Is the shoulder girdle appendicular or axial?
appendicular skeletonThe bones of the appendicular skeleton make up the rest of the skeleton, and are so called because they are appendages of the axial skeleton. The appendicular skeleton includes the bones of the shoulder girdle, the upper limbs, the pelvic girdle, and the lower limbs.
Which is not part of axial skeleton?
Answer and Explanation: The E) pelvic girdle is not part of the axial skeleton. This is part of the lower limbs, according to common practice.
What is the shoulder girdle?
The shoulder girdle is composed of the clavicle and the scapula, which articulates with the proximal humerus of the upper limb. Four joints are present in the shoulder: the sternoclavicular (SC), acromioclavicular (AC), and scapulothoracic joints, and glenohumeral joint.
What bones are considered part of the axial skeleton?
Your axial skeleton is made up of the 80 bones within the central core of your body. This includes bones in your skull (cranial and facial bones), ears, neck, back (vertebrae, sacrum and tailbone) and ribcage (sternum and ribs).
What are the 7 axial bones?
Vertebral ColumnCervical vertebrae (7)Thoracic vertebrae (12)Lumbar vertebrae (5)Sacrum (1)Coccyx (1)
What bones are part of the shoulder girdle quizlet?
The Pectoral (shoulder) Girdle is part of the appendicular skeleton and consists of the clavicle and scapula posteriorly.
What is part of appendicular skeleton?
The appendicular skeleton is comprised of the upper and lower extremities, which include the shoulder girdle and pelvis. The shoulder girdle and pelvis provide connection points between the appendicular skeleton and the axial skeleton to where mechanical loads transfer.
What are axial and appendicular bones?
The 80 bones of the axial skeleton form the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum. The appendicular skeleton consists of 126 bones and includes the free appendages and their attachments to the axial skeleton.
Which of the following is not part of the appendicular skeleton?
So as your answers, the ribs are not part of our particular skeleton, and the ligaments connect the bones of the upper arm to the bones of the lower arm.
What is the girdle of the axial skeleton?
These bones connect the arms on each side, and the girdle actually functions as the anchor that attaches the appendages to the axial skeleton. Key facts.
Which joint is located between the shoulder girdle and the axial skeleton?
posteriorly, there is a physiological joint – ( scapulothoracic joint) or muscular connection between the shoulder girdle and the axial skeleton, which is formed by muscles including the trapezius, rhomboids and serratus anterior. This scapulothoracic joint is highly mobile and allows great movements of the pectoral girdle.
What is the clavicle?
Clavicle. The clavicle or collar bone is an S-shaped long bone lying superficial and is palpable along its entire length (figure 3). It connects the upper limb to the trunk. The shaft (body) of the clavicle has a double curve in a horizontal plane.
Why is the scapula covered on both sides?
Usually there are also fractured ribs. Most fractures require little treatment because the scapula is covered on both sides by muscles. Most fractures involve the protruding subcutaneous acromion.
What nerves supply the glenohumeral joint?
The nerve supply include the axillary, suprascapular, and the lateral pectoral nerves. Try out our quiz to solidify your knowledge about the glenohumeral joint.
What is the shoulder girdle?
The shoulder girdle is also called the pectoral girdle, and it is a bone ring, incomplete posteriorly. The shoulder girdle is formed by two sets of bones : the scapulae, posteriorly, the clavicles anteriorly and completed anteriorly by the manubrium of the sternum (part of the axial skeleton).
Where is the shoulder blade?
The shoulder blade or scapula is a triangular flat bone (figure 4 below) that lies on the posterolateral aspect of the thorax, overlying the 2nd – 6th or 7th ribs.
What are the bones of the shoulder girdle?
Bones of the Shoulder Girdle. The shoulder girdle is made up of two posterior scapulae and two anterior clavicles. These bones make an incomplete ring around the upper thoracic cage. The medial end of each clavicle articulates with the manubrium and scapulae; each scapula connects to the thoracic cage by muscle only.
Which ligament supports the movement of the shoulder?
They are connected by the coracoacromial ligament. This ligament supports proper movement of the joint by arching over the superior portion of the shoulder, protecting it. The scapular spine (in pale orange-red) is a prominent plate of bone that serves as the attachment site for portions of the trapezius and the deltoid.
What is the scapula part of?
The scapula is part of the shoulder girdle as well as the shoulder's ball-and-socket joint, one of the most versatile joints in the body!
What is the scapula's surface called?
Image from Human Anatomy Atlas. Each scapula has a concave, articular surface called the glenoid cavity (or glenoid fossa), which articulates with the head of the humerus. The cavity is covered with cartilage.
Which ligaments are part of the articular capsule that surrounds a synovial joint?
The ball-like head of the humerus articulates with the glenoid cavity, creating a ball-and-socket joint that allows the upper limb great motility. A capsular ligament is part of the articular capsule that surrounds a synovial joint (freely moving joint); capsular ligaments reinforce joints and provide stability.
What is the bone that is the scapula?
The scapula is such an interesting bone. I mean, look at it! It's such a cool shape that it's also known as the shoulder blade. You are walking around with two knives permanently strapped to your back. How awesome is that?
Which joint has more motility?
The Glenoid Cavity and the Shoulder Joint. Hold one of your arms out and rotate it. Your arms have more motility than your legs, despite the fact that the shoulder and hip joints are the same type of joint! Image from Human Anatomy Atlas.
What is the girdle of the shoulder?
The anatomy of the shoulder girdle consists of several joints, or articulations, which connect the upper limb to the rest of the skeleton. You may also see this referred to as the pectoral girdle in some textbooks.
What are the three bones that make up the shoulder girdle?
The three bones which form the shoulder girdle are the clavicle, scapula, and the humerus.
How many muscles are in the scapula?
It is encased by 17 muscles which provide control and stabilisation against the thoracic wall (the ribcage). This is sometimes referred to as the Scapulothoracic joint, although it is not technically an actual joint. The scapula has a shallow fossa (socket) on its lateral (outside) edge into which the head of the humerus fits.
How much does the Glenohumeral Joint rotate?
Note that during elevation the Glenohumeral Joint rotates 2° for every 1° of scapulothoracic rotation (most of us don’t need to worry about this fact but it can be handy for clinicians to know).
What is the Glenohumeral joint?
The Glenohumeral joint is a ball and socket joint which provides a large proportion of the movement at the shoulder girdle. The head of the humerus articulates (moves) ...
Which muscle is attached to the clavicle?
The clavicle is also an important site for muscle attachments including: Pectoralis Major. Trapezius. Sternocleidomastoid. Sternohyoid. Subclavius. The clavicle meets the scapula at the top of the shoulder where it connects to the acromion process, forming the acromioclavicular joint (AC joint).
What is articular cartilage?
Both articulating surfaces are covered with articular cartilage. This is a tough, hard, shiny cartilage which protects the bone underneath. Common injuries include Dislocated shoulder and Glenoid labrum tear.
How many bones are in the axial skeleton?
Axial Skeleton. The axial skeleton contains 80 bones. 29 bones in the head – 8 cranial, 14 facial bones and 6 auditory ossicles and the Hyoid Bone. 26 bones in the vertebral column (24 vertebrae, the sacrum, and the coccyx) 25 bones in the thorax – (the sternum and 24 ribs)
Where are the rounded ends of the ribs?
The rounded ends of the ribs are joints to the thoracic vertebrae and the flattened ends come together at the sternum. The uppermost seven pairs of ribs join to the sternum with costal cartilage and are recognized as “true ribs.”. The 8th to 10th ribs have non-costal cartilage which attaches them to the ribs above.
What is the rib cage?
The rib cage is comprised of 12 pairs of ribs and the sternum. The rib cage protects the vital organs such as the heart and lungs. The ribs are crescents like shaped, among one end is flattened and the opposite end is rounded. The rounded ends of the ribs are joints to the thoracic vertebrae and the flattened ends come together at the sternum.
Why are the last two ribs called floating ribs?
The last two ribs are described “floating ribs” because they do not connect to the sternum or to other ribs. The length of each rib extends from number one to seven and then declines pair number 12. The first rib of the thoracic cage is the shortest, widest, flattest, and most curved.
What are the two parts of the human body?
The Human Skeleton can be divided up into two parts, the axial Skeleton, and the appendicular skeleton. The central part of the body contains the axial skeleton, and the bones lying along a central axis of the body are the appendicular skeleton.
How many vertebrae are there in the coccyx?
If the coccyx and sacrum each as one vertebra, then there are will be 26 vertebrae. If the fused vertebrae all are numbered separately, then the whole number of vertebrae becomes to between 32 and 34. The vertebral column consists of 5 parts.
What are the bones of the skull?
Skull Bones. The skull consists of the cranium and the facial bones. The cranium contains and protects the brain in a space designated the cranial vault. The cranium is composed of eight bones which fit together at connection points called sutures. Cranium bones-.
Which type of bone ends are connected by a plate or pad of cartilage, no cavity present?
Articulating bone ends that are connected by a plate or pad of cartilage, no cavity present; Both synarthroses and amphiarthroses (allows for some movement); Two major types
Which muscle attaches to the lateral surface of the humerus?
Raises area in lateral surface of humerus to which deltoid muscle attaches
Which condyle articulates with the ulna?
Distal condyle of the humerus that articulates with the ulna
Which part of the ulna receives part of the ulna when the forearm is?
Anterior depression, superior to the Trochlea, which receives part of the ulna when the forearm is flexed
Which bone has the superior most margin?
Superior most margin of the coxal bone
Which bone is formed by the pubic and ischial rami?
Opening in hip bone formed by the pubic and ischial rami
Which part of the bones is interlocked and is united by connective tissue?
irregular edges of bones interlock and are united by connective tissue
What is the appendicular skeleton?
The Appendicular Skeleton. An activity to help you learn the parts of the appendicular skeleton of the human body. anterior depression, superior to the trochlea, which receives part of the ulna when the forearm is flexed. This activity was created by a Quia Web subscriber.
What bones are in the arm?
arm bone. Clavical and Scapula. bones of the shoulder girdle. Radius and Ulna. forearm bones. Acromion. scapular region to which the clavical connects. Scapula. shoulder girdle bone that is unattached to the axial skeleton.
What bone is involved in the formation of the elbow joint?
forearm bone involved in formation of the elbow joint,medial bone of the forearm in anatomical position. Capitulum. rounded knob on the humerus, adjoins the radius. Coronoid Fossa. anterior depression, superior to the trochlea, which receives part of the ulna when the forearm is flexed. Carpals. wrist bones. Phalanges.
Which bones articulate with the clavical?
wrist bones. Phalanges. finger bones, toe bones. Metacarpals. heads of these bones form the knuckles. Scapula and Sternum. bones that articulate with the clavical. Ilium, ischium, and pubis. fuse to form the coxial bone.
Which bone transmits forces from the upper limb to the bony thorax?
Clavical. shoulder girdle bone that transmits forces from the upper limb to the bony thorax. Glenoid Cavity. depression in the scapula that articulates with the humerus. Coracoid process. process above the glenoid cavity that permits muscle attachment. Clavical. collar bone.
What is the longest bone in the body?
deep socket in the coxal bone that recieves the head of the thigh bone . Sacroiliac Joint. joint between the axial skeleton and the pelvic girdle. Femur. longest, strongest bone in the body, the thigh bone. Fibula. thin lateral leg bone.
