Matošu

The Matošu is the trunk of the Ibrófeneð and takes the form of a flexible tube extending from the top part of the Žëša. It plays important functions in digestion, positional stability and balance, object manipulation, communication, and many cultural practices and norms. Biologically, however, its main use is for grabbing and swallowing rocks for digestion by the Tewaðup. To achieve this, the Matošu is endowed with an immense amount of maneuverability and flexibility. Alongside being able to bend and twist into a variety of conformations, it is able to shrink or elongate the length and sometimes even conceal it within a designated cavity in the Оö-Ëtavú.

The Matošu is made of three layers, with the inner and outer being made of nearly-identical materials.

Being most exposed to the outside world, the outside layer is very thick, and trails only behind the Ýyr-Vëtiš in thickness. It is very rugged in texture and dotted with creases on account of stresses experienced during the various motions exacted by the Ibrófeneð.

The middle layer is a complex series of muscles that numbers 4 separate groups in total. This abundance of muscle types is the main reason behind its flexibility, as the Vëtïš-Mëta, the muscles of the legs, only has two types.

The inner layer is responsible for maintaining the structural integrity of the Matošu and keeping it from collapsing on itself. In addition, it experiences much more stress than all other body parts, as it is scraped from the rocks that it ingests and and pinched by the muscle systems during the motions. As such, it is a blend of the spongy, bone-like material of the Оö and the smooth gel-like texture of the skin, resulting in a combination of structure, stress resistance, and durability.