Gas exchange Flashcards
The gas exchange system clears and…
warms the air.
The gas exchange system maximises…
the surface area for the diffusion of gases.
The gas exchange system minimises…
the distance for diffusion.
The gas exchange system maintains adequate…
gradients for diffusion.
Lungs are located in…
the thoracic cavity.
Lungs are surrounded by…
the pleural membranes.
Pleural membranes enclose…
the airtight spaces willed with fluid which reduces firction=free movement
The lungs are ventilated by the movement of…
diaphragm and ribs.
Mucous membranes line…
the whole bronchial tree.
A mucus released from…
goblet cells traps the dirt particles.
Cilia are used to…
move the mucus to the throat.
Trachea structure:
- C-shaped cartilage rings
- goblet cells
- smooth muscle
- cilia
- mucus glands
Bronchi structure:
- Irregular blocks of cartilage
- goblet cells
- smooth muscle
- cilia
- few mucus glands
Terminal bronchioles structure:
- no goblet cells
- no cartilage
- smooth muscle
- cilia
Respiratory bronchioles structure:
-few cilia
Alveoli do not contain any…
of the features found in the trachea.
Trachea carries…
air towards the lungs.
Oesophagus has…
irregular lumen, no cartilage and thick layer of smooth muscle.
The bronchus is the first…
branch from the trachea.
Respiratory epithelium in bronchus is not as…
thick and has more elastic tissue.
Wall of the trachea from the inside:
ciliated epithelium basement membrane mucus glands elastic glands cartilage
Terminal bronchiole is surrounded by smooth muscle used to…
control the flow of air.
Alveoli are air…
sacs, lined by a very thin epithelial layer made of squamous epithelial cells (0.5 micro)
Alveoli have moist…
surface for faster diffusion and to prevent sticking to each other.
Walls of alveoli contain…
many capillaries and elastic fibres, allowing them to expand.
