Lab 24: Respiratory System Flashcards
1
Q
Lung Ventilation
A
- contraction and relaxation of the diaphragm and intercostal muscles
- trachea lined with tough cartilage
- main function: gas exchange
2
Q
Define Contraction of the Diaphragm
A
- increases the volume in the thoracic cavity
- lowers the air pressure in the lungs
- creates a negative pressure
3
Q
Define Relaxation of the Diaphragm
A
- decreases the volume in the thoracic cavity
- forces air out of the lungs
4
Q
Human Respiratory System Diagram
A
5
Q
Fetal Pig Respiratory System Diagram
A
6
Q
Pathway of Airflow
A
- nares
- nasopharynx
- glottis
- larynx
- trachea
- bronchi
- bronchioles
- alveoli
7
Q
Nares Function
A
-prevent dust from entering the lungs by mucus and hair
8
Q
Nasopharynx Function
A
-equalizes air pressure
9
Q
Glottis Function
A
-sound production
10
Q
Larynx Function
A
- provides airway between pharynx and trachea
- switching channel that routes air and food
11
Q
Bronchi Function
A
-conduct air into and out of the lungs
12
Q
Bronchioles Function
A
-conduct air to the alveoli
13
Q
Alveoli
A
- location of gas exchange
- oxygen poor blood enters
- oxygen rich blood leaves
- contain blood capillaries on surface
14
Q
A
- normal lung tissue
- open space, circular alveoli
15
Q
A
- Emphysema tissue
- diseases, dead alveoli
- more empty space
- no gas exchange occuring
16
Q
Total Lung Capacity (TLC)
A
- total volume of air that lungs can hold
- average TLC is 6 liters
- measured by a spirogram
- TLC = Vital Capacity + Residual Capacity
