When a person has a laceration and you see dark red blood, the blood vessel  that is damaged is the: a. Integumentary.b. Capillary. c. Vein. d. Artery.

When observing dark red blood at the site of a laceration, it is important to understand what this indicates about the type of blood vessel that has been damaged.

1. Understanding Blood Color:

   • Bright red blood typically indicates oxygen-rich blood, usually found in arteries.
   • Dark red blood is usually associated with venous blood, which is lower in oxygen content and thus darker in appearance.

2. Types of Blood Vessels:

   • Integumentary: This term refers to the integumentary system, which includes skin, hair, nails, etc., rather than a type of blood vessel.
   • Capillary: Capillaries are small blood vessels where oxygen and nutrients are exchanged, but they usually don't release dark red blood in significant amounts during lacerations.
   • Vein: Veins carry oxygen-depleted blood back to the heart, which is dark red. Damage to a vein could result in dark red blood at the site of the laceration.
   • Artery: Arteries carry oxygen-rich blood, typically bright red, and damage to an artery would be characterized by bright red blood.

3. Conclusion: Since the question specifies that the blood observed is dark red, this strongly suggests that a vein has been damaged.

Final Answer

The blood vessel that is damaged is c. Vein.