Salsa de Molcajete. Salsa de Molcajete refers to a salsa that is ground by hand in a molcajete, Mexico's version of the mortar and pestle. Nearly all salsas used to be prepared this way, but now many cooks use blenders and food processors. Because of this, even in Mexico the term evokes nostalgia for the handmade quality of bygone days.
Overview. The major passages and structures of the upper respiratory tract include the nose or nostrils, nasal cavity, mouth, throat (pharynx), and voice box (larynx). The respiratory system is lined with a mucous membrane that secretes mucus.
Physiological respiration occurs across the respiratory system, which includes the upper and lower respiratory tracts. The upper respiratory tract is composed of the nasal cavity, sinuses, pharynx and larynx, while the lower respiratory tract includes the trachea, lungs, bronchi and the diaphragm. Physiological respiration is also known as ventilation and breathing, and it involves inhalation and exhalation processes. Ventilation occurs involuntarily, but a person can modify breathing. Healthline notes that respiration is important because the body cannot store oxygen.