A person has a laceration to the right arm, and it is spurting bright red blood. The blood vessel is: a. The artery. b. The vein. c. The capillary.d. Venous.

To determine the blood vessel involved in the case described, we can analyze the characteristics of blood flow from different types of blood vessels:

1. Arteries: These carry oxygenated blood away from the heart (except for the pulmonary artery which carries deoxygenated blood to the lungs). When an artery is lacerated, the blood tends to spurt out because of the high pressure within the arteries. The blood is usually bright red due to its oxygen content.

2. Veins: These carry deoxygenated blood back to the heart. If a vein is lacerated, the blood flow is typically slower and tends to ooze out rather than spurt. The blood is darker red as it carries less oxygen.

3. Capillaries: These are tiny blood vessels where the exchange of oxygen and carbon dioxide occurs. A laceration in these vessels results in a slow oozing of blood rather than spurting.

4. Venous: This term pertains to veins, and as stated, a laceration here would cause oozing rather than spurting.

Final Answer

Given that the blood is spurting bright red, the blood vessel involved is a. The artery.