The Sun heats up the Earth
At least, mostly
It heats up the molecules in the air, which also explains why it's colder the higher you are- there are less air molecules for the Sun to heat up
Carbon dioxide acts as a greenhouse gas and retains heat radiation from the sun, which, combined with other greenhouse gases helps to maintain the earths surface temperature. Without the presence of CO2 in the atmosphere, most of the solar radiation would not be retained and thus the surface temperature would be very low and unable to sustain human life.
Your brain helps your body to maintain a constant temperature by detecting temperature receptors that are found in the skin. Temperature is controlled by the hypothalamus.
The ability to sweat is a major characteristic that helps maintain homeostasis. By sweating an individual cools their body temperature when it is too warm. This in turn keeps the body at a homeostatic temperature in which the proteins and enzymes (within the body) continue to function as normal.
Water's high specific heat capacity helps to maintain body temperature. High specific heat capacity indicates a need for more energy to raise or lower the temperature of water. Sweat is another way that water helps maintain temperature. When sweat evaporates it draws in energy from the surroundings (the air and the body surfaces it is in contact with), effectively lowering the temperature.
The sun
Carbon dioxide acts as a greenhouse gas and retains heat radiation from the sun, which, combined with other greenhouse gases helps to maintain the earths surface temperature. Without the presence of CO2 in the atmosphere, most of the solar radiation would not be retained and thus the surface temperature would be very low and unable to sustain human life.
erosion helps bring fossils to earths surface by when a animal dies it turns into a fossil
Thermal
Sweat helps maintain your body temperature, Whenever your sweat evaporates, it cools you down.
YES!
thyroid
Your question is not quite clear, but if you are asking "does the circulatory system help maintain body temperature?" then I would the answer is yes. It moves blood throughout the body which regulates the body temperature. Doing so also supplies supplies oxygen and nutrients for the cells in your body.
temperature ... and hydration
sweating
It would be the reference point. Hope this helps :)
it helps it by keeping body temperature constant
Ozone layer helps to maintain the appropriate temperature. This helps plant grow and survive.