Gas Exchange System Tissues and Components (OCR A-Level Biology A): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Role of cartilage in airways
Role of cartilage in airways
Prevents collapse of large-diameter airways
What are mucopolysaccharides?
What are mucopolysaccharides?
Complex polysaccharides containing amino groups
Function of mucociliary escalator
Function of mucociliary escalator
Moves mucus with trapped particles upward toward oesophagus
What do goblet cells produce?
What do goblet cells produce?
Mucus that traps particles and maintains airway moisture
Smooth muscle function in airways
Smooth muscle function in airways
Contracts/relaxes to adjust airway diameter
Role of elastic fibres in expiration
Role of elastic fibres in expiration
Enable passive expiration through elastic recoil
Shape of tracheal cartilage
Shape of tracheal cartilage
C-shaped rings; gap faces oesophagus
Bronchi cartilage vs trachea
Bronchi cartilage vs trachea
Complete rings (not C-shaped)
Why bronchioles lack cartilage
Why bronchioles lack cartilage
Narrow diameter makes them structurally self-supporting
Alveoli wall structure
Alveoli wall structure
Single layer of epithelial cells