The Rule of Threes The Rule of Threes states that the human body can survive for: 3 minutes without oxygen 3 days without water 3 weeks without food However… other factors can prolong or shorten these times.

Factors that can prolong. Factors that can shorten. Air Factors that can prolong. Age children and Mammalian Response Environment Temperature- colder is better Altitude- lower is better Factors that can shorten. Age Lack of oxygen transfer as age increases due to environmental and lifestyle choices. Environment Temperature- warmer is worse Altitude- less oxygen at higher altitudes

Factors that can prolong. Factors that can shorten. Water Factors that can prolong. Activity Level Lower activity level uses less water Environment Temperature- colder is better Food intake Some foods contain higher amounts of water Factors that can shorten. Activity Level Increased activity leads to higher level of cellular respiration resulting in increased water loss. as well as perspiration. Environment Temperature- warmer is worse = increased perspiration. Age and Gender Women have less water Children have a greater surface area to volume ratio.

Factors that can prolong. Factors that can shorten. Food Factors that can prolong. Initial body state people with a higher BMI have more stored energy Metabolic rate Adults lower Women lower Differences among individuals Environment Temperature-Average temperatures better. Factors that can shorten. Initial body state people with a lower BMI have less stored energy Metabolic rate Children higher Men higher Differences among individuals Environment Extremes are worse.

In General Any number of very specific health disorders could lead to severe impacts on the Rule of Threes.