The ___________ of the heart is the inferior portion of the ventricles.

• A. atrium
• B. apex
• C. septum
• D. base

Answer: (B)

Verified step by step guidance

1. Step 1: Begin by understanding the anatomy of the heart. The heart has four chambers: two atria (upper chambers) and two ventricles (lower chambers). The ventricles are responsible for pumping blood out of the heart.
2. Step 2: Familiarize yourself with the directional terms used in anatomy. 'Inferior' refers to a position lower or closer to the feet, while 'superior' refers to a position higher or closer to the head.
3. Step 3: Learn the specific parts of the heart. The apex of the heart is the pointed, inferior tip formed primarily by the left ventricle. It is located at the bottom of the heart and points slightly to the left.
4. Step 4: Compare the options provided in the question. The atrium refers to the upper chambers, the septum is the wall dividing the left and right sides of the heart, and the base is the superior portion of the heart where major blood vessels are attached. None of these are the inferior portion of the ventricles.
5. Step 5: Conclude that the correct term for the inferior portion of the ventricles is the 'apex,' as it matches the anatomical description provided.