Final answer:
The hematic system is commonly referred to as the cardiovascular system, which includes the heart and blood vessels, and is responsible for blood circulation throughout the body.
So, the correct answer is B.
Step-by-step explanation:
The term 'hematic system' refers to the system of the body that is related to the blood. Considering the options provided, the hematic system is commonly called the cardiovascular system. The lymphatic system is a separate but related system that is involved in immune function and fluid balance. It is not synonymous with the hematic system, which is dedicated to the circulation of blood and includes organs such as the heart, arteries, and veins.
Therefore, the correct answer for the student's question is B. cardiovascular.