Correct spelling for the English word "thenal" is [θˈiːnə͡l], [θˈiːnəl], [θ_ˈiː_n_əl] (IPA phonetic alphabet).
Thenal is an adjective that refers to the region or area surrounding the nostrils of an animal, particularly mammals. It specifically describes the external opening or aperture of the nasal cavity through which air passes in and out during respiration. The term "thenal" is commonly used in zoology to describe the anatomical structure and characteristics of this part of an animal's face.
In terms of morphology, the thenal region usually consists of a pair of small, movable, and muscular flaps or septa on either side of the nostrils. These flaps are often covered with hair and are typically involved in regulating the airflow entering the nasal passage.
The importance of the thenal region lies in its role in respiration, as it serves as the primary entry point for air that is inhaled and exhaled by an animal. Additionally, it also plays a vital role in filtering, warming, and moistening the air before it reaches the respiratory system.
Overall, thenal pertains to the nasal area of an animal and describes the structural features of the nostrils and surrounding tissue. This term is particularly relevant when discussing the functional aspects of respiration and the anatomy of mammals.
Relating to the palm of the hand.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.