脈 mai "meridian": "The blood vessels, distributed all over the human body and animal body, carry blood everywhere."
we choose to analyze the four atypical body parts: 血, 肉, 骨, 脈, each of which is defined by the online dictionary compiled by the Ministry of Education, Taiwan (MOE Dictionary) as 1 血 xie "blood": "The red fluid in the veins/vessels of higher organisms, which starts from the heart and circulates throughout the body.