The document discusses the anatomy and functions of the nose. It is divided into the external nose and internal nasal cavity. The internal nasal cavity is further divided into the respiratory region and olfactory region. The nasal cavity is lined with mucous membrane and has bony and cartilaginous structures that provide support. It functions to warm, humidify, and filter air as well as receive secretions from paranasal sinuses.

1. N.K.J AYURVEDIC MEDICAL
COLLEGE & P.G. CENTRE, BIDAR.

2. It is an organ of smell.
Passageway for air to
lungs.

3. It is divided into __
a) External Nose
b) Internal Nose
Philtium is a space between
lips and nose.

4. It consists
of_
1. Root
2. Apex
3. Bridge
4. External

5. Consists of a supporting
framework of bone and
Hyaline cartilage.
Lined by mucous membrane.

6. Frontal bone, Nasal bone,
and Maxillae form the bony
framework.
Cartilagenous framework
consist of Septal Nasal
Cartilage, Lateral Nasal
Cartilge and Alar.

8. Nasal septum is the middle
wall of nasal cavity.
It is a large space in the
anterior aspect of the skull.
Inferior to nasal bone.
Superior to oral cavity.

9. Lined with mucous membrane
and muscles.
Anteriorly, merges with
External nose.
Posteriorly merges with
Nasopharynx through two
openings called Internal
nares or Chonae.

10. Each half has_
1. height- 5cm
2. length- 5-7cm
3. roof- 7cm long and 2mm
wide
4. floor- 5cm long and 1.5mm
wide

11. Nasal cavity is divided into_
›Larger and inferior
Respiratory region
›Smaller and superior
Olfactory region.
The respiratory region is
lined with Pseudostratified
ciliated columnar epithelium

12. The anterior portion of nasal
cavity just inside the
nostrils i.e, Nasal vestibule
is surrounded by cartilage.

13. • 4 bones:
• Sphenoid Bone
• EthmoidBone
• FrontalBone
• Nasal Bone
Roof
• Hard part is a bony palate
whichseperates it from the
oral cavity.
Floor

14. Warms and humidifies the
incoming air.
Filters impurities from
inspired air.
Receives secretion from
paranasal sinuses and Naso-
lacrimal duct.