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The lungs and respiratory system allow oxygen in the air to be taken into the body, while also enabling the body to get rid of carbon dioxide in the air breathed out. Respiration is the term for the exchange of oxygen from the environment for carbon dioxide from the body's cells.
Answer:
Option d , speed over time - like running
Explanation:
Force is mathematical terms in defined as a product of mass of an object and it acceleration.
Acceleration is caused when speed changes over time.
Among all the given options, in option D the speed over time will cause acceleration and thus produce a force.
Force being a vector quantity required change of speed in some direction. While running , both quantity and direction can be assumed to be changing.
Thus, option D is correct.
Homeostasis is a self-regulating technique by which systems
in the body maintain stability and tend to adjust to optimal conditions which
are essential for survival. Thereby, the role of homeostasis is to help the
body maintain constant internal environment. A good example of homeostasis
would be ‘drinking excess alcohol causes vomiting’.
Plant cells have and animals do not have cell walls <span />
