BRAINCAKEGas Exchange in Insects
The need for gas exchange conflicts with the need to conserve water.
Pores in the exoskeleton called spiracles lead to a network of internal tubes called tracheae that branch into tracheoles that extend through the body tissues of the insect.
The trachea are supported by rings of chitin to prevent them collapsing.
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Key terms in this lesson
- diffusion
- The net movement of molecules or ions from a region of higher concentration to a region of lower concentration, down a concentration gradient.
More in Exchange Surfaces and Breathing
- Measuring Lung Capacity
- Lung Volume
- Breathing Rate and Ventilation Rate
- Gas Exchange in Unicellular Organisms
- Diffusion Gradient
- Mass Transport
- Increasing the Rate of Diffusion
- Limitations of the Tracheal System
All 24 lessons in Exchange Surfaces and Breathing · All OCR AS-level Biology topics