Final answer:
An aural hematoma is the accumulation of blood between the skin and cartilage of an ear flap, typically due to trauma or injury. Coagulation is the blood clotting process that aims to seal and heal such injuries.
Step-by-step explanation:
The term that indicates the ear flap has filled with blood is aural hematoma. An aural hematoma is a condition where blood accumulates between the skin and the cartilage of an animal's ear flap. It commonly occurs due to injury or trauma, such as shaking of the head or scratching due to ear infections, which can cause a blood vessel to rupture, leading to blood filling the space and causing the ear to swell. Coagulation is the process of blood clotting, where a gelatinous but robust clot made up of a mesh of fibrin, platelets, and blood cells forms to seal injuries and prevent further bleeding.
Similar to how a platelet plug can temporarily seal a small opening in a blood vessel to buy the body time for more permanent repairs, an aural hematoma is a collection of blood resulting from the body's attempt to heal the injury. However, in the case of an aural hematoma, veterinary intervention is often required to alleviate the condition and prevent further complications.