Four or five bones fuse to form the __________, or the “tailbone.”Multiple Choicecervicallumbarsacrumcoccyx

Break Down the Problem

1. Identify the structure referred to as the "tailbone."
2. Understand the options given: cervical, lumbar, sacrum, coccyx.
3. Determine the correct anatomical term that fits the description.

Relevant Concepts

• The "tailbone" is a common name for a specific structure in human anatomy.
• The coccyx consists of a fusion of four to five vertebrae.

Analysis and Detail

1. Cervical: Refers to the neck region (C1 to C7 vertebrae) and does not relate to the tailbone.
2. Lumbar: Refers to the lower back (L1 to L5 vertebrae), also not related to the tailbone.
3. Sacrum: A triangular bone at the base of the spine, made up of five fused vertebrae, located above the coccyx.
4. Coccyx: Specifically known as the tailbone, formed from the fusion of four to five vertebrae.

Verify and Summarize

• The term that specifically identifies the "tailbone" is the coccyx, which consists of four or five fused bones.

Final Answer

Coccyx