血管

1. Origins, structure, and basic meaning

• Structure: 血管 is read as けっかん and means “blood vessel”.
• Basic usage: The examples show a vessel checked before an injection and heart–vessel connections studied with a model.

2. Common pitfalls and similar expressions

• Distinguishing senses and uses
  • It is the general term for vessels carrying blood, including 動脈, 静脈, and tiny 毛細血管.