how does radiation, conduction, and convection work in the human body
I found this that may be of some help. Scroll down about 3/4 to the end to a small symbolic picture of a human being. Parts are labeled to show where conduction, convenction, and radiation are taking place.
http://www.rwc.uc.edu/koehler/biophys/8d.html
Radiation, conduction, and convection are three different types of heat transfer that occur constantly in the human body.
1. Radiation: In the context of the human body, radiation refers to the process by which heat is transferred through electromagnetic waves. The human body constantly gives off heat in the form of infrared radiation. This heat radiation occurs mainly through the skin, as the body's core temperature is higher than the surrounding environment. The human body also absorbs radiant heat when exposed to external sources, such as sunlight.
2. Conduction: Conduction is the transfer of heat between two objects in direct contact. In the human body, conduction occurs when two objects at different temperatures come into contact with each other. For example, when you touch a hot surface, such as a stove, heat is transferred from the stove to your skin through conduction. Inside the body, conduction plays a role in transferring heat from the warmer core to the cooler skin.
3. Convection: Convection refers to the transfer of heat through the movement of a fluid (liquid or gas). In the context of the human body, convection occurs mainly through the circulation of blood. When the body is exposed to cold conditions, the blood vessels near the skin's surface constrict, reducing heat loss. Conversely, in warm conditions, the blood vessels dilate, allowing more heat to escape through the skin. This process helps to regulate body temperature.
The link you provided contains additional visual information that may be helpful in understanding how these heat transfer mechanisms work within the human body. It features a diagram illustrating the areas where conduction, convection, and radiation occur. By examining this visual representation, you can gain a clearer understanding of how these processes operate in relation to different parts of the body.