Answer:
respiratory, digestive and circulatory system
Explanation:
the respiratory system brings oxygen into the lungs when you breathe. the digestive system breaks food down into nutrients such as glucose. the circulatory system transports glucose and other nutrients from the digestive system to the cells.
A liquid mixture of Hydrocarbons
Carbon, Hydrogen is found in carboxyl group
Answer:
0 electrons in outermost shell as it is a noble gas
