Organization of Skeletal Bone

Question 1

What are the primary functions of the skeletal system?

Answer 1

Support, facilitate movement, and protect the body

The skeletal system acts as a scaffold for the body, similar to steel beams in a building.

Question 2

How do bones facilitate movement?

Answer 2

Serve as points of attachment for muscles and act as levers

Joints serve as fulcrums for the levers created by bones.

Question 3

What organs are protected by the skeletal system?

Answer 3

• Brain
• Spinal cord
• Heart
• Lungs
• Pelvic organs

Ribs protect the lungs and heart, while vertebral column protects the spinal cord.

Question 4

How many bones are in the adult human skeleton?

Answer 4

206 bones

Younger individuals have more bones due to fusion during childhood and adolescence.

Question 5

What are the two major divisions of the skeleton?

Answer 5

• Axial skeleton
• Appendicular skeleton

Question 6

What is included in the axial skeleton?

Answer 6

• Skull
• Vertebral column
• Thoracic cage

The axial skeleton consists of 80 bones that protect vital organs.

Question 7

How many bones make up the skull?

Answer 7

22 bones

Additional seven bones are associated with the head, including the hyoid and ear ossicles.

Question 8

What bones comprise the vertebral column?

Answer 8

• 24 vertebrae
• Sacrum
• Coccyx

Question 9

What is the function of the appendicular skeleton?

Answer 9

Includes all bones of the upper and lower limbs and their attachment to the axial skeleton

There are 126 bones in the appendicular skeleton.

Question 10

What bones form the pectoral girdle?

Answer 10

• Scapula
• Clavicle

Question 11

What is the role of the clavicle?

Answer 11

Connects the upper limb to the axial skeleton

The clavicle articulates with the sternum and scapula.

Question 12

How are the bones of the lower limbs adapted?

Answer 12

For weight-bearing support and stability

Lower limbs are essential for locomotion such as walking or running.

Question 13

True or False: The upper limbs are primarily adapted for stability and weight-bearing.

Answer 13

False

Upper limbs are adapted for mobility and manipulation of objects.

Question 14

What is the primary storage function of the skeletal system?

Answer 14

Storage of important minerals like calcium and phosphate

Bone marrow stores fat and produces blood cells.

Question 15

Fill in the blank: The axial skeleton forms the _______ of the body.

Answer 15

vertical, central axis