Where are Chinchillas From? Chinchillas have such an exotic sounding name â and one that evokes thoughts of far off places, romantic locations and cute, cuddly animals. Now, whilst most experienced chinchilla owners are aware of where our fluffy pals originate, there are many people who arenât so familiar. So, Where are Chinchillas Actually From? Well, the soft and furry chinchilla originally comes from South America where they could be found high up in the rocky mountainous crevices on the western slopes of the Andes Mountains. These stretch from Peru in the north, down through Bolivia and Chile, to Argentina in the south.
adventitia. n. 1. (Anatomy) the outermost covering of an organ or part, esp the outer coat of a blood vessel. [C19: New Latin, from the neuter plural of Latin adventÄ«cius; see adventitious].dventitia. n. 1. (Anatomy) the outermost covering of an organ or part, esp the outer coat of a blood vessel. [C19: New Latin, from the neuter plural of Latin adventÄ«cius; see adventitious].
More Answers. The tunica externa, also known as the tunica adventitia, is the outermost layer of a blood vessel, surrounding the tunica media. It is mainly composed of collagen and is supported by external elastic lamina.The collagen serves to anchor the blood vessel to nearby organs, giving it stability.unica externa or tunica adventitia is the outer most layer of the blood vessels. It is mostly composed of collagen which helps to anchor the blood vessel with nearly organ. The second or middle layer of blood vessel is tunica media.