Rib healing: No real good studies on rib fractures. They can hurt for weeks or longer depending on how bad the fractures are. Usually walking around is good.
Subcutaneous tissue. The subcutaneous tissue, also called the subcutis, hypodermis, hypoderm, subcutis, or superficial fascia, is the lowermost layer of the integumentary system in vertebrates.
Meaning: Below the skin. Context example: inject subcutaneously. Pertainym: subcutaneous (relating to or located below the epidermis)