the part of the body that separates the mouth from the nasal cavity is the palate.
the part of the body that separates the mouth from the nasal cavity is the palate.
the part of the body that separates the mouth from the nasal cavity is the?
palate
at the end of the sixth week the nasal pits have deepened further and they fuse to make a large ectodermal nasal sac. this sac will be above and to the back of the intermaxillary process. leading into the seventh week, the nasal sac floor and posterior wall grow to form a thickened plate-like ectodermal structure called the nasal fin. the nasal fin separates the sac from the oral cavity. within the fin, vacuoles develop that fuse with the nasal sac. this enlarges the nasal sac and at the same time thins the fin to a membrane - the oronasal membrane that separates the nasal pits from the oral cavity. during the seventh week the oronasal membrane ruptures and disintegrates to form an opening - the single primitive choana.  the intermaxillary segment extends posteriorly to form the primary palate which makes up the floor of the nasal cavity. during the eighth and ninth weeks a pair of thin extensions form from the medial walls of the maxillary process. these extensions are called the palatine shelves that form the secondary palate. the secondary palate will endochondrally ossify to form the hard palate - the end-stage floor of the nasal cavity.  during this time ectoderm and mesoderm of the frontonasal process produce the midline septum. the septum grows down from the roof of the nasal cavity and fuses with the developing palates along the midline. the septum divides the nasal cavity into two nasal passages opening into the pharynx through the definitive choanae.
human nose
nasal cavity









































the nasal cavity is a large, air-filled space above and behind the nose in the middle of the face. the nasal septum divides the cavity into two fossae. each fossa is the continuation of one of the two nostrils. the nasal cavity is the uppermost part of the respiratory system and provides the nasal passage for inhaled air from the nostrils to the nasopharynx and rest of the respiratory tract.









































the paranasal sinuses surround and drain into the nasal cavity.









































section::::structure.
nasal cavity