Mean difference data were applied to reported standard oral esophagoscopy landmark measurements to conert to standard landmark measurements from the nares.
This leathery armor protects their skin while they hunt, and any captured prey that tries to escape is impaled on the keratinized spikes lining the leatherback's esophagus.
And you'll notice that the esophagus, which heads to your stomach, is nice and flexible, while your trachea, or windpipe, is rigid and has prominent rings.
However, what's responsible for the actual sensation of pleasure and feeling of liking when the juice hits your tongue and goes down your throat is endogenous opioids.