Respiratory system 1 Flashcards
1
Q
Define respiratory
A
intake of oxygen into the body for chemical
reaction with food to release energy and carbon dioxide as a byproduct of respiration
2
Q
Function of respiratory
A
- Gas exchange in the alveoli
- Warming, moistening and filtering air
- Smell: Breathing in air activates the olfactory nerve, which sends messages to your brain about scents.
3
Q
The organs of the respiratory system
A
- nose,
- pharynx,
- larynx,
- trachea,
- two bronchi,
- two lungs and
- muscles of respiration (the intercostal muscles and the diaphragm)
4
Q
For functional purposes the respiratory system is divided into
two parts namely:
A
- The conducting zone
- The respiratory zone
4
Q
Divisions of the respiratory system
A
a. The upper respiratory system which is composed of the nose,
nasal cavity, pharynx and associated structures
b.The lower respiratory system which is composed of the larynx,
trachea, bronchi and the lungs.
5
Q
The conducting zone
A
- consists of a series of interconnected cavities and tubes both outside and inside the lungs
- Nose, nasal cavity, pharynx, larynx, trachea to terminal bronchioles
6
Q
Functions of the conducting zone
A
- filter air
- Warming air
- Moistening air
- Conducting air into the lungs
7
Q
The respiratory zone and functions
A
- include respiratory bronchioles, alveolar ducts, alveolar sacs and alveoli
- Main areas for gaseous exchange
8
Q
The nose
A
- The nasal cavity has a floor, a roof and lateral walls
- Nasal cavity divided into 2 by nasal septum made of 2 bones
- Exterior openings are called exterior nares and interior, interior nares
9
Q
Functions of the nose
A
- Air passage in and out of the body
- Filtering and moistening air
- Sense organ for smell
10
Q
How does the nose detect smell
A
- there’re nerve endings detecting smell by odorous materials and these impulses are conveyed to the brain by the olfactory nerve where secretion is perceived.
