Pharynx: This is the passage way for air and food. It includes 3 regions:
1- Oropharynx: posterior to pharynx
2- Nasopharynx: posterior to nose
3- Laryngopharynx: opens to larynx and esophagus
Esophagus: This allows food and drink to pass. At the lower end of the esophagus, we have the cardiac spincter (closes the stomach so that acidic stomach juices cannot go up the esophagus.
1- Oropharynx: posterior to pharynx
2- Nasopharynx: posterior to nose
3- Laryngopharynx: opens to larynx and esophagus
Esophagus: This allows food and drink to pass. At the lower end of the esophagus, we have the cardiac spincter (closes the stomach so that acidic stomach juices cannot go up the esophagus.
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