Question
State four characteristics of gaseous exchange or respiratory surfaces.
Answer
- Always moist to dissolve gases which diffuse in solution form
- Thin-walled/epithelium this is one cell thick to reduce the distance of molecules moves.
- Have a large surface area for maximum exchange of gases (Highly branched or highly folded to increase the surface area).
- Highly vascularised to maintain a sleep concentration gradient hence maximum gaseous exchange.
- Must be permeable to respiratory gases.
- Thin-walled/epithelium this is one cell thick to reduce the distance of molecules moves.
- Have a large surface area for maximum exchange of gases (Highly branched or highly folded to increase the surface area).
- Highly vascularised to maintain a sleep concentration gradient hence maximum gaseous exchange.
- Must be permeable to respiratory gases.
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