Test #6: Respiratory & Urinary Systems Flashcards
How many functions of the nose?
5 functions
What are the 5 functions of the nose?
- Provides an airway; 2. Warms and moistens air; 3. Filters air; 4. Olfactory sense; and 5. Resonating chamber for speech
How many external parts to the nose?
2 parts
What are the 2 external parts to the nose?
- Nasal bones; and 2. Hyaline cartilage
How many internal parts to the nose?
4 parts
What are the 4 internal parts to the nose?
- Nasal septum; 2. Olfactory and respiratory mucosa; 3. Conchae; and 4. Paranasal sinuses
Nose: Nasal Septum
Made up of the vomer bone and perpendicular plate of the ethmoid bone
Nose: Olfactory Mucosa
Lines the roof of the nasal cavity where the sense of smell is located. Chemoreceptors (nerve endings which respond to chemicals in solution) send an action potential to the brain.
Nose: Respiratory Mucosa
Lines the walls and floor of the nasal cavity. All mucosa have nerve endings which responds to debris triggering a sneeze.
Nose: Conchae
Superior and middle are bone markings on the ethmoid cranial bone. Inferior are facial bones. They warm, moisten and filter air.
Nose: Paranasal sinuses
Open cavities within bone which lightens weight of the skull and act as resonating chambers. They warm, moisten and filter air.
How many paranasal sinuses?
4 paranasal sinuses
What are the 4 paranasal sinuses?
- Frontal; 2. Sphenoid; 3. Ethmoid; and 4. Maxillary
Pharynx
aka “The Throat”
5-inch long skeletal muscle tube.
How many functions of the pharynx?
3 functions
What are the 3 functions of the pharynx?
- Common pathway for air and food; 2. Equalizes pressure (auditory tubes); and 3. Houses tonsils
How many parts of the pharynx?
3 parts
What are the 3 parts of the pharynx?
- Nasopharynx; 2. Oropharynx; and 3. Laryngopharynx
Pharynx: Nasopharynx
Connects the nasal cavity to the oropharynx
How many parts of the nasopharynx?
3 parts
What are the 3 parts of the nasopharynx?
- Tonsils; 2. Auditory Tubes; and 3. Cilia
Nasopharynx: Tonsils
Tonsils present are the pharyngeal (adenoids) and tubal.
Nasopharynx: Auditory Tubes
Equalize pressure between nasopharynx and inner ear.
Nasopharynx: Cilia
The mucous membrane is ciliated to move the mucous blanket down toward the mouth and stomach (to swallow and cough it out).
Pharynx: Oropharynx
Posterior to oral cavity; connects the nasopharynx to the laryngopharynx.
Oropharynx: Tonsils
Tonsils present are the palatine and lingual.
Pharynx: Laryngopharynx
Connects the oropharynx to the esophagus and larynx.
Larynx
aka “The Voicebox”
About 2 inches in length and made up of 9 pieces of cartilage.
How many functions of the larynx?
4 functions
What are the 4 functions of the larynx?
- Airway; 2. Switching mechanism; 3. Speech; and 4. Cilia
Larynx: Airway
It provides and open airway.
Larynx: Switching mechanism
the epiglottis routes food down the esophagus and away from the lungs. The epiglottis will trigger a cough reflex if food enters the larynx.
Larynx: Speech
The vocal chords are located here and the larynx is attached to the hyoid bone.
Larynx: Cilia
Moves the mucous blanket up towards esophagus and mouth.
How many parts to the larynx?
4 parts
What are the 4 parts to the larynx?
- Thyroid Cartilage; 2. Epiglottis; 3. Glottis; and 4. Vocal chords
Larynx: Thyroid Cartilage
aka “The Adam’s Apple”
1 of 9 pieces of cartilage that make up the larynx. Male’s is larger due to testosterone.
Larynx: Glottis
Opening of the larynx
Larynx: Vocal Chords
Made up of skeletal muscle and elastic ligaments stretched across the opening of the larynx and vibrate as air passes by them.
An increase of volume is caused by an increase of air.
Male vocal chords are thicker and less taught which lowers pitch and tone due to testosterone.
Trachea
aka “the Wind Pipe”
An open airway tube held open by hyaline cartilage rings. They are C-shaped and the posterior is smooth muscle to allow the esophagus to expand when swallowing food. It branches to the left and right to serve the lungs.
Lungs
Fill the thoracic cavity from the clavicles down to the diaphragm. The right lung has 3 lobes or segments and the left lung has 2 to make room for the heart.
Pleural Membranes
Pleura is a double layer serous membrane which houses and protects the lungs.
What are the 2 layers of the pleural membrane?
- Parietal pleura; and 2. Visceral pleura
Parietal Pleura
Outer layer just deep to the ribs and on top of the diaphragm.
Visceral Pleura
Inner layer, covers the lungs themselves.
Pleural Cavity and Fluid
Thin space between the the parietal and visceral layers filled with serous fluid to reduce friction when the lungs expand and recoil.
The bronchial tree is made up of how many zones?
2 zones
What are the 2 zones of the bronchial tree?
- Conducting zone; and 2. Respiratory zone
How many parts of the conducting zone?
5 parts
What are the 5 parts of the conducting zone?
- Primary bronchi; 2. Secondary bronchi; 3. Tertiary bronchi; 4. Bronchioles; and 5. Terminal bronchioles
Bronchial Tree: Conducting Zone*
It “conducts” or delivers air to/from the lungs.
Trachea branches to enter the lungs at the level of T7 > primary bronchi > secondary bronchi > tertiary bronchi > branches up to 23 times > at 1 mm they are called bronchioles > at .5 mm they are called terminal bronchioles
How many parts of the respiratory zone?
3 parts
What are the 3 parts of the respiratory zone?
- Respiratory bronchioles; 2. Alveolar ducts; and 3. Alveoli
Bronchial Tree: Respiratory Zone*
It does gaseous exchange (O2 & CO2)
Terminal bronchioles > respiratory bronchioles > alveolar ducts > alveoli (about 300 million functional units)
How many characteristic changes along the bronchial tree pathway?
7 characteristic changes
What are the 7 characteristic changes along the bronchial tree pathway?*
1-3. Cilia, cartilage rings and mucous production decreases
4-7. Elastic tissue, smooth muscle, macrophages, and lymphoid nodules increases
What helps alveolus to recoil?
Surface tension of water molecules inside alveolus.
What prevents alveolus from collapsing completely during recoil?
Surfactant - a fat protein/molecule reduces the surface tension of the water molecules inside alveolus.
How many phases of respiration?
4 phases