ANAT Theory Flashcards
(55 cards)
How many bones make up the appendicular skeleton?
126 bones
What are the two girdles that attach the limbs to the trunk?
- Pectoral girdle
- Pelvic girdle
What is the primary function of the pectoral girdle?
Attaches the upper limbs to the trunk
What bones make up the pectoral girdle?
- Clavicle
- Scapula
True or False: The pectoral girdle completely encircles the body.
False
Where does the medial end of each clavicle articulate?
With the manubrium and first rib
What joint is formed at the lateral ends of the clavicles?
Acromioclavicular joint
What is the function of the scapula?
Provides attachment for many muscles that move the upper limb
What is the glenoid fossa?
Socket of the shoulder joint
What is the primary characteristic of the glenoid cavity?
Very shallow, good for flexibility but bad for stability
What are the two ends of the clavicle called?
- Sternal end
- Acromial end
What is the common cause of clavicle fractures?
Falling on an outstretched arm or hitting the shoulder directly
What anatomical feature of the clavicle helps prevent inward fractures?
The curves in the clavicle
What are the three borders of the scapula?
- Superior border
- Medial (vertebral) border
- Lateral (axillary) border
What are the two angles of the scapula?
- Inferior angle
- Superior angle
What muscles are involved in the protraction of the scapula?
- Pectoralis minor
- Serratus anterior
What muscles are involved in the retraction of the scapula?
- Trapezius
- Rhomboids
What is the anatomical position of the radius and ulna?
Radius is lateral and ulna is medial
What joint allows the forearm to bend on the arm?
Hinge joint formed by ulna and humerus
What is the major landmark of the ulna responsible for forming the elbow joint?
Olecranon process
What structure interconnects the radius and ulna?
Interosseous membrane
What is a Colles’ fracture?
Fracture that occurs when falling on an outstretched hand, causing the distal end of the radius to be forced posteriorly
What are the three types of bones in the hand?
- Carpals
- Metacarpals
- Phalanges
How many carpal bones are there?
Eight