Fig. 22 Oblique view of the relationship of the internal and external carotid arterial systems to the orbit. (ExCA, external carotid artery; FA, facial artery; AA, angular artery; IMA, internal maxillary artery; MMA, middle meningeal artery; TFA, transverse facial artery; STA, superficial temporal artery; InCA, internal carotid artery; OA, ophthalmic artery; LA, lacrimal artery; IB, intraconal branches; PEA, posterior ethmoidal artery; AEA, anterior ethmoidal artery; SOA, supraorbital artery; STA, supratrochlear artery; PA, peripheral arcade; MA, marginal arcade; ZA, zygomatic artery; ZTA, zygomaticotemporal artery; ZFA, zygomaticofacial artery; IOA, infraorbital artery; DNA, dorsal nasal artery; RMA, recurrent middle meningeal artery)