I would say the respiratory system (the lungs) fail. The lungs are to receive oxygen and it sends it to the heart.
I am not much of a biology nerd but I am taking an educational guess.
All I can say that the lungs need oxygen. Without oxygen, the heart will stop pumping blood and you will be suffocating with this essential. That is why you should never smoke and actually take great care of your precious body.
Answer:
Temperature, Precipitation, Humidity, Cloud Cover
Answer:
(First) 10,000--->1000--->100-->10 (fourth)
Explanation:
Each trophic levels gets reduced by factor of 10.
Thus if you start with 10,000 in first, then you end with 1000 in second, 100 in third and 10 in forth.
Answer:
(a) cell
Explanation:
"What do scientist call the basic unit of life?
The basic unit of life is the cell. In 1838, scientists Theodor Schwann and Matthias Schleiden came up with the original version of the cell theory, which concluded that the basic unit of living things is the cell."
