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The trabeculae carneae (columnae carneae, or meaty ridges), are rounded or irregular muscular columns which project from the inner surface of the right and left ventricles of the heart. These are different from the pectinate muscles, which are present in the right atrium and the atrial appendages of the heart.he trabeculae carneae (columnae carneae, or meaty ridges), are rounded or irregular muscular columns which project from the inner surface of the right and left ventricles of the heart. These are different from the pectinate muscles, which are present in the right atrium and the atrial appendages of the heart.
Definition. The valleculae are spaces located on either side of the midline posterior to the tongue and anterior to the epiglottis. The piriform recess is the space in the laryngopharynx just posterior to the larynx between the thyroid cartilage and the aryepiglottic fold.efinition. The valleculae are spaces located on either side of the midline posterior to the tongue and anterior to the epiglottis. The piriform recess is the space in the laryngopharynx just posterior to the larynx between the thyroid cartilage and the aryepiglottic fold.