動脈

1. Origins, structure, and basic meaning

• Structure: Written 動脈 and read どうみゃく, it denotes a blood vessel carrying blood away from the heart.
• Basic usage: It is used to explain vascular function and locate an artery at the wrist.

2. Common pitfalls and similar expressions

• Direction, not oxygen alone
  • The defining distinction from a vein is flow away from the heart.