The Skeleton Quiz

The axial skeleton consists of how many bones?

• 80

• 126

• 60

• 50

Answer explanation

The axial skeleton, which includes the skull, vertebral column, and rib cage, consists of 80 bones in total. This makes 80 the correct answer, as the other options do not accurately represent the number of bones in the axial skeleton.

What is the primary function of the axial skeleton?

• Movement

• Protecting vital organs

• Digestion

• Producing blood cells

Answer explanation

The primary function of the axial skeleton is to protect vital organs, such as the brain, heart, and lungs, by providing a sturdy framework. It supports the body's structure and safeguards these essential systems.

Which of the following bones is NOT part of the axial skeleton?

• Skull

• Rib cage

• Vertebral column

• Humerus

Answer explanation

The humerus is not part of the axial skeleton; it is a bone in the upper limb. The axial skeleton includes the skull, rib cage, and vertebral column, which support the central axis of the body.

The appendicular skeleton consists of how many bones?

• 80

• 126

• 100

• 206

Answer explanation

The appendicular skeleton consists of 126 bones, which include the bones of the limbs and the pelvic and shoulder girdles. This is distinct from the axial skeleton, which has 80 bones.

What does the hyoid bone support?

• Skull

• Throat

• Ear

• Eye

Answer explanation

The hyoid bone supports the throat by providing an anchor point for the muscles associated with swallowing and speech. It is not directly connected to other bones, making it unique in its role in the throat.

The frontal bone forms the back part of the skull.

Answer explanation

The statement is incorrect. The frontal bone is located at the front of the skull, forming the forehead, while the back part of the skull is formed by the occipital bone.

The mandible is the only movable bone of the skull.

Answer explanation

The mandible, or lower jaw, is the only bone in the skull that can move, allowing for actions like chewing and speaking. All other skull bones are fixed and do not allow movement.

The sphenoid bone connects with all other cranial bones.

Answer explanation

The sphenoid bone is unique as it articulates with all other cranial bones, serving as a keystone in the skull structure, thus confirming the statement is true.

The rib cage is part of the appendicular skeleton.

Answer explanation

The rib cage is part of the axial skeleton, not the appendicular skeleton. The axial skeleton includes the skull, vertebral column, and rib cage, while the appendicular skeleton consists of limbs and their attachments.

The TMJ (Temporomandibular Joint) connects the skull with the clavicle.

Answer explanation

The TMJ (Temporomandibular Joint) connects the skull to the mandible (jawbone), not the clavicle. The clavicle connects the arm to the body. Therefore, the statement is incorrect.