The space at the back of the mouth, that leads either to the airway or the esophagus is the:*1 pointpharynxlarynxnasal cavityconchae

To answer the question, we first need to identify the anatomical structures and their functions related to the spaces in the throat.

1. Definitions of Terms:

   • Pharynx: A muscular tube that connects the nose and mouth to the esophagus and airway, hence it serves both the respiratory and digestive systems.
   • Larynx: Also known as the voice box, it is situated below the pharynx and primarily responsible for sound production and protecting the airway during swallowing.
   • Nasal cavity: The space behind the nose that plays a crucial role in breathing and filtering air but does not connect directly to the esophagus.
   • Conchae: Also known as turbinates, these are bony projections within the nasal cavity that help to warm and humidify inhaled air.

2. Analysis of the Functionality:

   • The pharynx is the only structure that leads to both the airway and esophagus, effectively functioning in both respiration and digestion.

Final Answer

The correct answer is pharynx.