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RESPIRATORY SYSTEM
THE HUMAN RESPIRATORY SYSTEM
• The respiratory system consists of the nose,
pharynx (throat), larynx (voice box), trachea
(windpipe), bronchi, and lungs.
Structurally, the respiratory system consists of
two parts:
1. The upper respiratory system includes the
nose, nasal cavity, pharynx and associated
structures.
2. The lower respiratory system includes the
larynx, trachea, bronchi and lungs.
1. The conducting zone consists of a series
of interconnecting cavities and tubes both
outside and within the lungs.
These include the nose, nasal cavity, pharynx,
larynx, trachea, bronchi, bronchioles, and
terminal bronchioles. Their function is to
filter, warm, and moisten air and conduct it
into the lungs
2. The respiratory zone consists of tubes
and tissues within the lungs where gas
exchange occurs.
These include the respiratory bronchioles,
alveolar ducts, alveolar sacs and alveoli. (Gas
exchange occur in these zone)
Respiratory mucosa
• It is a layer of pseudostratified ciliated
columnar epithelial cells that secrete mucus.
• Found in nose, sinuses, pharynx, larynx and
trachea
• Mucus can trap contaminants
–Cilia move mucus up towards mouth
NOSE
• It provides an entrance for air in which air is
filtered by hairs inside the nostrils.
• It has two portions : the external and
internal.
– External nares (choanae) - opening to exterior
– Internal nares opening to pharynx
• The external portion is supported by a
framework of bone and cartilage covered
with skin and lined with mucous
membrane.
• The internal portion is a large cavity in the
skull, merging with the external nose
anteriorly and communicating with the
throat posteriorly.
NASAL CAVITY
• The entrance of the respiratory system that is
divided into an external portion and an internal
portion called the nasal cavity.
• Interior area of the nose; lined with a sticky
mucous membrane and contains tiny surface
hairs called cilia. It divided medially by the
nasal septum.
• Particles trapped in the mucus are carried to
the pharynx by ciliary action, swallowed, and
carried to the stomach where gastric juice
destroys any microorganisms in the mucus.
• The anterior portion of the nasal cavity just
inside the nostrils, called the nasal vestibule,
is surrounded by cartilage.
• The superior part of the nasal cavity is
surrounded by bone.
• A vertical partition, the nasal septum, divides
the nasal cavity into right and left sides. The
anterior portion of the nasal septum consists
primarily of hyaline cartilage.
PARANASAL SINUSES
• Four bones of the skull contain paired air spaces
called the paranasal sinuses - frontal, ethmoidal,
sphenoidal, maxillary.
• Add resonance to voice.
• Communicate with the nasal cavity by ducts.
• Lined by pseudostratified ciliated columnar
epithelium.
PHARYNX
• The pharynx is a funnel-shaped tube
about 13 cm long that starts at the
internal nares and extends to the level of
the cricoid cartilage, the most inferior
cartilage of the larynx.
• The pharynx lies just posterior to the
nasal and oral cavities, superior to the
larynx, and anterior to the cervical
vertebrae.
• It is a common passageway for air
and food.
• Its wall is composed of skeletal muscles and
is lined with a mucous membrane.
• The muscles of the entire pharynx are
arranged in two layers, an outer circular
layer and an inner longitudinal layer.
• Relaxed skeletal muscles help keep the
pharynx patent and contraction of the
skeletal muscles assists in deglutition
(swallowing).
• Pharynx is divided into three regions
– Nasopharynx - uppermost portion
– Oropharynx - middle portion
– Laryngopharynx - lowermost portion
Nasopharynx
• Superior-most region of the pharynx.
• Covered with pseudostratified ciliated
columnar epithelium.
• Location:
– posterior to the nasal cavity
– superior to the soft palate.
– lateral walls of the nasopharynx connect to the
auditory/eustachian tubes which open into middle
ear.
• Normally, only air passes through.
• Material from the oral cavity and oropharynx is
typically blocked from entering the
nasopharynx by the uvula of soft palate, which
elevates when swallow.
• Posterior nasopharynx wall also houses a
single pharyngeal tonsil (commonly called the
adenoids).
RESPIRATORY SYSTEM'S ANATOMY BY AKKI LORR.ppsx

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RESPIRATORY SYSTEM'S ANATOMY BY AKKI LORR.ppsx

  • 2. THE HUMAN RESPIRATORY SYSTEM • The respiratory system consists of the nose, pharynx (throat), larynx (voice box), trachea (windpipe), bronchi, and lungs.
  • 3.
  • 4. Structurally, the respiratory system consists of two parts: 1. The upper respiratory system includes the nose, nasal cavity, pharynx and associated structures. 2. The lower respiratory system includes the larynx, trachea, bronchi and lungs.
  • 5. 1. The conducting zone consists of a series of interconnecting cavities and tubes both outside and within the lungs. These include the nose, nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, and terminal bronchioles. Their function is to filter, warm, and moisten air and conduct it into the lungs
  • 6. 2. The respiratory zone consists of tubes and tissues within the lungs where gas exchange occurs. These include the respiratory bronchioles, alveolar ducts, alveolar sacs and alveoli. (Gas exchange occur in these zone)
  • 7. Respiratory mucosa • It is a layer of pseudostratified ciliated columnar epithelial cells that secrete mucus. • Found in nose, sinuses, pharynx, larynx and trachea • Mucus can trap contaminants –Cilia move mucus up towards mouth
  • 8.
  • 9. NOSE • It provides an entrance for air in which air is filtered by hairs inside the nostrils. • It has two portions : the external and internal. – External nares (choanae) - opening to exterior – Internal nares opening to pharynx
  • 10. • The external portion is supported by a framework of bone and cartilage covered with skin and lined with mucous membrane. • The internal portion is a large cavity in the skull, merging with the external nose anteriorly and communicating with the throat posteriorly.
  • 11. NASAL CAVITY • The entrance of the respiratory system that is divided into an external portion and an internal portion called the nasal cavity. • Interior area of the nose; lined with a sticky mucous membrane and contains tiny surface hairs called cilia. It divided medially by the nasal septum. • Particles trapped in the mucus are carried to the pharynx by ciliary action, swallowed, and carried to the stomach where gastric juice destroys any microorganisms in the mucus.
  • 12. • The anterior portion of the nasal cavity just inside the nostrils, called the nasal vestibule, is surrounded by cartilage. • The superior part of the nasal cavity is surrounded by bone. • A vertical partition, the nasal septum, divides the nasal cavity into right and left sides. The anterior portion of the nasal septum consists primarily of hyaline cartilage.
  • 13.
  • 14.
  • 15. PARANASAL SINUSES • Four bones of the skull contain paired air spaces called the paranasal sinuses - frontal, ethmoidal, sphenoidal, maxillary. • Add resonance to voice. • Communicate with the nasal cavity by ducts. • Lined by pseudostratified ciliated columnar epithelium.
  • 16.
  • 17. PHARYNX • The pharynx is a funnel-shaped tube about 13 cm long that starts at the internal nares and extends to the level of the cricoid cartilage, the most inferior cartilage of the larynx. • The pharynx lies just posterior to the nasal and oral cavities, superior to the larynx, and anterior to the cervical vertebrae. • It is a common passageway for air and food.
  • 18. • Its wall is composed of skeletal muscles and is lined with a mucous membrane. • The muscles of the entire pharynx are arranged in two layers, an outer circular layer and an inner longitudinal layer. • Relaxed skeletal muscles help keep the pharynx patent and contraction of the skeletal muscles assists in deglutition (swallowing).
  • 19. • Pharynx is divided into three regions – Nasopharynx - uppermost portion – Oropharynx - middle portion – Laryngopharynx - lowermost portion
  • 20.
  • 21. Nasopharynx • Superior-most region of the pharynx. • Covered with pseudostratified ciliated columnar epithelium.
  • 22. • Location: – posterior to the nasal cavity – superior to the soft palate. – lateral walls of the nasopharynx connect to the auditory/eustachian tubes which open into middle ear. • Normally, only air passes through. • Material from the oral cavity and oropharynx is typically blocked from entering the nasopharynx by the uvula of soft palate, which elevates when swallow. • Posterior nasopharynx wall also houses a single pharyngeal tonsil (commonly called the adenoids).