Respiratory system helps in breathing and it leads to exhalation of the gas carbon dioxide which is not required by the body. The integumentary system is the first line of defense and protects the body from invadig microbes, dust, and other harmful substances. The digestive system protects the body by enabling digestio of food and providing energy to sustain, further the toxic waste materials are also released during the process.
It is an advantage due to the fact you do not have to think about it. therefore while sleeping you still breathe and you do not have to be conscious
Answer:
B: Warm to Cool with the wavy arrows
Explanation:
Radiation travels from warm objects to cool objects
