7. The Skeletal System

Of the two bones in the forearm, which bone is medial?

When a person falls, a common reaction is to try to catch themselves by sticking out their hands. This will sometimes lead to a fracture in one or both of the bones of the forearm. Because one forearm bone is larger where it articulates with the wrist, this bone tends to absorb more force from the impact and is broken more often, making it the most commonly broken bone in the body. Where would such a break likely occur?

Arrange the bones of the upper limb from proximal to distal. Some bones may not be included.

Often people will 'crack' their knuckle by pulling on their pointer finger. The cracking sound comes from knuckle where the finger meets the hand. What's another way to describe this location?

Which of the following portions of the scapula articulates with the clavicle?

a. Coracoid process

b. Acromion

c. Spine

d. Glenoid cavity

Use key choices to identify the bone descriptions that follow.

Key:

a. carpals

b. femur

c. fibula

d. humerus

e. radius

f. tarsals

g. tibia

h. ulna  

______ (1) articulates with the acetabulum and the tibia     

______ (2) forms the lateral aspect of the ankle     

______ (3) bone that 'carries' the hand     

______ (4) the wrist bones     

______ (5) end shaped like a monkey wrench     

______ (6) articulates with the capitulum of the humerus     

______ (7) largest bone of this 'group' is the calcaneus

Justiniano worked in a poultry-packing plant where his job was cutting open chickens and stripping out their visceral organs. After work, he typed for long hours on his computer keyboard, writing a book about his work in the plant. Soon, his wrist and hand began to hurt whenever he flexed it, and he began to awaken at night with pain and tingling on the thumb half of his hand. What condition did he probably have?