C. Organ System
Like said in the definition above, an organ system is a group of organs working together to perform a specific function for the organism.
hope this helps !! have a great day :))
Brain energy requirement, metabolism and neurotransmitter turnover consume 20 % of the available oxygen and glucose in the body.
<span>Even though, the brain is only about 2% of the body weight, it consumes about 20% of the body's energy. It is the main consumer of glucose-derived energy. When the mental strain increases, the brain's demand for energy in the form of oxygen and glucose is higher.</span>
Answer:When present en masse, it is possible to see pollen on surfaces of objects such as cars, patio tables, sidewalks, etc. Pollen on CarHowever, it is rare to actually see pollen when it is present in the air because the number of grains in a given volume of air is too low to be seen with the unaided eye.
Explanation:
