Question

wrap in a dressing, place in plastic bag and place on ice
cool the area to prevent further damage.
major open wound
an embedded object
minor heat burn
minor open wound
a severed body part

Explanation:

For a severed body part, wrapping it in a dressing, placing it in a plastic bag, and putting it on ice helps preserve it. For a minor heat burn, cooling the area prevents further damage.

Answer:

Wrap in a dressing, place in plastic bag and place on ice: A severed body part.
Cool the area to prevent further damage: minor heat burn.