The respiratory tract of birds possesses unique air movement properties. Air moves in a unidirectional flow and blood travels in a concurrent direction to air flow. An advantage of this type of system is it minimizes dead space and enables the bird to maintain a highly oxidative, active output. The respiratory system of the common raven is no different.

Driver, Jonathan C., Charlie Lake Cave. Simon Fraser University. Available at: ​ http://www.sfu.museum/journey/an-en/postsecondaire-postsecondary/grotte_du_lac_charlie-charlie_lake_cave People often tend to think abstract ideas and things are vague and therefore hardly pay any importance to them. Abstract tattoo designs and their ideas bind a deeper meaning, powerful secrets of many many ancient cultures together and present it to the modern age. Ravens since the age of time have been a bird of bad omen as they feed in dead bodies. Ravens also have a close relation to Norse mythology including various gods and goddesses. Ravens are not only a symbol of death, but they also strike the fear of ill omen to others. You might want to choose a Ravenish magical name. There are many names associated with Raven from the differing traditions. Below is a list of European names:

Sacred Rituals

Raven skull tattoos are not very common and owing to its various symbolism, they can be drawn in many ways. Each of those various designs can be pretty uniquely done depending on what you want to express through your tattoo. You can also add other elements to accentuate the meanings more.

a b c Barceló, Gonzalo; Salinas, Jonathan; Sabat, Pablo (August 2012). "Body mass, phylogeny and diet composition affects kidney morphology in passerine birds". Journal of Morphology. 273 (8): 842–849. doi: 10.1002/jmor.20024. PMID 22505059. S2CID 35234682. The Scottish Goddess of winter, The Cailleach, sometimes appears as a raven. A touch from her brings death.

References

In the animal world, ravens natural enemies are the great horned owl and red tail hawk. Ravens will cooperate together and mob these bigger birds to drive them off.