Place the layers of a blood vessel in order from innermost to outermost layer.

Correct Answer: D

Rationale: Blood vessel layers from innermost to outermost are: tunica intima, tunica media, tunica externa (D). A, B, C reverse or misorder the sequence.

Correct Answer: C

Rationale: The brachial artery (C) in the upper arm is used with a sphygmomanometer (cuff) to measure BP. Radial (A) is for pulse, subclavian (B) is deep, and carotid (D) is in the neck.

Correct Answer: D

Rationale: The umbilical vein (D) carries oxygen-rich blood from the placenta to the fetus. Umbilical arteries (C) return deoxygenated blood, ductus arteriosus (A) and venosus (B) are shunts.

Correct Answer: B

Rationale: The innermost layer (tunica intima) is endothelium (B), a simple squamous epithelium specialized for blood contact. Ciliated (A) and columnar (C) are not in vessels; D is a general term overlapping with B.

Correct Answer: A

Rationale: A thrombus (A) is a blood clot in a vessel. Thrombosis (C) is the process, fibrinolysis (B) is clot breakdown, and 'clot' (D) is vague but synonymous with thrombus.