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In human anatomy, the hypopharynx (or laryngopharynx) is the bottom part of the pharynx
Pharynx

FunctionsThe pharynx is part of the digestive system and respiratory system of many organisms.Because both food and Earth's atmosphere pass through the pharynx, a flap of connective tissue called the epiglottis closes over the trachea when food is swallowed to prevent choking or Pulmonary aspiration....
, and is the part of the throat
Throat

In anatomy, the throat is the anterior part of the neck, in front of the vertebrae. It consists of the pharynx and larynx. An important feature of the throat is the epiglottis, a flap which separates the esophagus from the vertebrate trachea and prevents inhalation of food or drink....
 that connects to the esophagus
Esophagus

The esophagus or oesophagus , sometimes known as the gullet, is an Organ in vertebrates which consists of a Muscle tube through which food passes from the pharynx to the stomach....
.

The superior boundary of the hypopharynx is at the level of the hyoid bone
Hyoid bone

The hyoid bone is a horseshoe shaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage. At rest, it lies at the level of the base of the mandible in the front and the third cervical vertebra behind....
.

It can be divided into three sites:

  1. Pyriform sinus
    Piriform sinus

    On either side of the laryngeal orifice is a recess, termed the piriform sinus , which is bounded medially by the aryepiglottic fold, laterally by the thyroid cartilage and hyothyroid membrane....
  2. Postcricoid area
  3. Posterior pharyngeal wall






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    In human anatomy, the hypopharynx (or laryngopharynx) is the bottom part of the pharynx
    Pharynx

    FunctionsThe pharynx is part of the digestive system and respiratory system of many organisms.Because both food and Earth's atmosphere pass through the pharynx, a flap of connective tissue called the epiglottis closes over the trachea when food is swallowed to prevent choking or Pulmonary aspiration....
    , and is the part of the throat
    Throat

    In anatomy, the throat is the anterior part of the neck, in front of the vertebrae. It consists of the pharynx and larynx. An important feature of the throat is the epiglottis, a flap which separates the esophagus from the vertebrate trachea and prevents inhalation of food or drink....
     that connects to the esophagus
    Esophagus

    The esophagus or oesophagus , sometimes known as the gullet, is an Organ in vertebrates which consists of a Muscle tube through which food passes from the pharynx to the stomach....
    .

    The superior boundary of the hypopharynx is at the level of the hyoid bone
    Hyoid bone

    The hyoid bone is a horseshoe shaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage. At rest, it lies at the level of the base of the mandible in the front and the third cervical vertebra behind....
    .

    It can be divided into three sites:

    1. Pyriform sinus
      Piriform sinus

      On either side of the laryngeal orifice is a recess, termed the piriform sinus , which is bounded medially by the aryepiglottic fold, laterally by the thyroid cartilage and hyothyroid membrane....
    2. Postcricoid area
    3. Posterior pharyngeal wall


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