Structure–Function Relationship
Foundations of Physiology, Homeostasis and Regulation of Body Function
A structure–function relationship links physical organization to a biological capability. Thin barriers can support exchange, whereas a force-transmitting tissue needs a different architecture.
| Concept | Meaning |
|---|---|
| Alveolar–capillary barrier | A short diffusion distance and large surface area aid gas exchange. |
| Tendon | Collagen aligned predominantly along the line of pull helps transmit muscle force. |
| Capillary | A thin wall permits exchange; permeability varies with capillary type and tissue. |
A structure provides a capability. The actual rate of exchange also depends on operating conditions such as blood flow.
Further reading: OpenStax — Overview of Anatomy and Physiology · OpenStax — Body Fluids and Fluid Compartments
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