A group of two or more types of tissues is a(n):

Correct Answer: C

Rationale: An organ, like the heart, comprises multiple tissue types (e.g., muscle, connective) working together, unlike a cell (A, single unit), organelle (B, cell part), or macromolecule (D, molecular level). This level of organization follows tissues, integrating diverse functions pumping blood in the heart highlighting anatomy's hierarchical structure.

Correct Answer: B

Rationale: The knee is distal (farther from trunk) to the thigh, which is proximal (closer). It's not anterior (A, front), lateral (C, side), or proximal. Distal reflects anatomy's limb gradient, positioning the knee below the thigh in standard terms.

Correct Answer: B

Rationale: The axial portion includes head, neck, spine, and ribs, forming the body's core, unlike appendicular (A, limbs), pelvis (C, lower), or trunk (D, torso only). In anatomy, axial structures support central stability, distinguishing them from limb regions.

Correct Answer: A

Rationale: Occipital refers to the back of the head (e.g., occipital bone), not eyes, cheek, or elbow. Anatomical regional terms like this clarify skull structure, essential for neurology or trauma assessment.

Correct Answer: A

Rationale: The ventral cavity holds pleural (lungs) and abdominopelvic cavities, unlike dorsal (B, spine/brain), thoracic (C, chest only), or pericardial (D, heart-specific). In anatomy, ventral encompasses anterior cavities, organizing body spaces systematically.