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.
1. The subcutaneous layer (hypodermis) is composed of loose connective tissue and insulating adipose tissue. It binds the skin to underlying organs and contains the blood vessels that supply the skin. No sharp boundary exists between the dermis and subcutaneous layer.. Melanocytes, which lie deep in the epidermis and underlying dermis, produce a pigment called melanin that protects deeper cells from the sun's ultraviolet rays. Melanocytes pass melanin to nearby cells through cytocrine secretion.