* Osmosis: Seawater is hypertonic to human cells, meaning it has a higher salt concentration. This creates a concentration gradient, causing water to move out of the cells and into the surrounding seawater. This process, called osmosis, leads to cell shrinkage and dehydration.
* Salt Toxicity: The high salt concentration in seawater is toxic to human cells. While our bodies have mechanisms to regulate salt levels, the sudden influx of salt overwhelms these mechanisms, leading to cell damage and malfunction.
* Ion Imbalance: The ion composition of seawater differs significantly from that of our body fluids. This imbalance can disrupt essential cellular processes, impacting the function of enzymes and other proteins.
* Cold Temperature: Seawater is generally colder than our body temperature. This can lead to hypothermia, slowing down cellular metabolism and potentially causing damage.
Consequences:
* Cell Death: The combined effects of osmosis, salt toxicity, and cold temperature lead to cell death.
* Organ Damage: Widespread cell death can damage vital organs, leading to organ failure.
* Systemic Shock: The body's response to the severe stress of seawater immersion can lead to systemic shock, a life-threatening condition.
Important Note: Even brief exposure to seawater can be dangerous. It is crucial to avoid prolonged immersion in seawater and to seek medical attention immediately if accidental exposure occurs.
