Which statement is true a bones are composed of a single layer B ones provide shape to the body C bones or organ systems D bones help the heart pump blood

Answer 1

The statement that is true is B: bones provide shape to the body.

Here's a brief explanation for the other options:

• A: Bones are composed of a single layer - This is false; bones are made up of multiple layers, including the outer cortical bone and the inner trabecular (or spongy) bone.
• C: Bones are organ systems - This is misleading; bones themselves are not organ systems. However, they are part of the skeletal system, which is composed of many bones.
• D: Bones help the heart pump blood - This is false; while bones play essential roles, they do not directly help the heart pump blood. The heart itself is a muscular organ responsible for blood circulation.