Question
Biology Question on locomotion and movement
| Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair. . | Pair of skeletal parts | Category |
|---|---|---|
| (a) | Sternum and ribs | Axial skeleton |
| (b) | Clavicle and glenoid cavity | Pelvic girdle |
| (c) | Flumerus and ulna | Appendicular skeleton |
| (d) | Malleus and stapes | Ear ossicles |
A
a
B
b
C
c
D
d
Answer
b
Explanation
Solution
Each pectoral girdle consists of two bones, clavicle and scapula. The scapula (shoulder blade) consists of a sharp ridge, the spine and a triangular body. The end of the spine projects as a flattened and expanded process called acromion. This process articulates with the clavicle. At the lateral end of the superior of the scapula is projection of the anterior surface called the coracoid process, to which the tendons of the muscles attach. At the point where the superior and lateral borders of the scapula meet there is the lateral angle which presents a shallow articular surface termed as glenoid cavity into which the head of the humer is articulated.