Class Summary - Today, we started talking about the Appendicular skeleton. We talked about the pectoral girdle including the clavicles and the scapula. The clavicles are s shaped bones that are very prone to fracture and brace the scapula and stabilize the shoulder. The scapulae, the shoulder blades, are a triangular shaped bone that have the following surface features; spine, acromion process, corocoid process and the glenoid cavity. The upper limb includes the humerus, the radius and the ulna. The humerus is a long bone that includes a head, greater and lesser tubercles, intertubercular groove, deltoid tuberosity, capitulum, trochlea and the coronoid fossa. We also talked about the radius. This is a shorter bone in the forearm. It is on the thumb side of the arm. It includes a head, radial tuberosity, ulnar notch and styloid process. We talked about the ulna being located on the opposite end of the thumb. The ulna has a couple surface features including the coronoid process, olecranon process, trochlear notch, radial notch, the head (which is actually towards the bottom of the bone) and the styloid process. The hand bones consist of the carpals (wrist), metacarpals (hand) and phalanges (fingers). All fingers have 3 phalanges (proximal, distal and intermediate) except the thumb which has 2 (proximal and distal).
Homework - There will be a quiz tomorrow with a word bank on the appendicular skeleton. I will be numbering bones and surface features for this quiz.
Objectives - Students will identify the bones and surface features of the appendicular upper half.