- Scalp (skin + dense subcutaneous tissue, galea aponeurotica) moves together over the loose connective tissue and periosteum - arterties run in the dense subq tissue, which keep lacerated vessels patent to bleed profusely ⇒ stop with pressure - infection can spread to the upper eyelids along potential space in the loose connective tissue ![[Pasted image 20250206002835.png]] ![[Pasted image 20250206002850.png]] ![[Pasted image 20250206002905.png]]