Tendons and ligaments are

Correct Answer: D

Rationale: Tendons (connecting muscle to bone) and ligaments (connecting bone to bone) are both dense, fibrous connective tissues composed primarily of collagen fibers. While ‘connective tissue’ (B) is broadly correct, ‘fibrous connective tissue’ (D) is more specific and accurate, distinguishing them from other connective tissue types like adipose or loose areolar tissue.

Correct Answer: B

Rationale: Ribs, sternum, and scapulae are flat bones, characterized by their thin, broad structure. Flat bones provide protection (e.g., ribs for lungs) and surfaces for muscle attachment (e.g., scapulae). They aren’t long (elongated), short (cuboidal), or irregular (complexly shaped).

Correct Answer: B

Rationale: The sternum (breastbone) is a flat bone in the chest that, along with the ribs, forms the rib cage, primarily protecting the heart. It also shields the lungs to some extent, but its central role is heart protection. The brain is protected by the cranium, and the liver is below the diaphragm.

Correct Answer: C

Rationale: The orbits are the bony sockets in the skull that house the eyes, protecting and positioning them. The nose and ears have their own distinct structures (nasal cavity, auditory canal) separate from the orbits.

Correct Answer: A

Rationale: The coccyx (tailbone) consists of four small vertebrae that fuse in adulthood into a single structure. The sacrum, while also fused (five vertebrae), is larger and supports the pelvis, making 'coccyx' the better fit for 'very small.'