Diffusion

Definition

Diffusion is the process where molecules move from an area of higher concentration to an area of lower concentration. It's an important natural process for the distribution of substances in the body.

Scientific / Technical Definition

Diffusion refers to the passive movement of molecules or particles along a concentration gradient, or from regions of higher to regions of lower concentration. It occurs in gases, liquids, and solids and is a key mechanism for the transport of substances across cell membranes in biological systems.

Benefits

• Facilitates the distribution and movement of nutrients and gases in the bloodstream.
• Helps in maintaining homeostasis within cells by balancing concentrations of different substances.
• Enables cells to absorb essential nutrients and dispose of waste products effectively.

Examples

• Oxygen diffusing into blood cells in the lungs.
• Nutrients moving into cells from the bloodstream.
• Carbon dioxide diffusing out of cells into the blood to be exhaled.

Additional Information

• Effects: Diffusion is crucial for physiological processes such as respiration and nutrient uptake in cells, ensuring that these processes occur efficiently without the need for external energy.

Related Terms

• Osmosis
• Active Transport
• Concentration Gradient
• Cell Membrane
• Homeostasis

References

• Principles of Diffusion and Transport Across Cell Membranes
• Understanding Diffusion and Its Role in Living Organisms