Question

for every organ and organ/body system to do its work... each individual tissue must receive oxygen from the respiratory system. each individual tissue must receive the molecule our body uses for chemical energy from the respiratory system. each individual cell must receive the molecule our body uses for chemical energy from the respiratory system. each individual cell must receive oxygen from the respiratory system.

Explanation:

To determine the correct answer, we analyze each option:

1. The first option mentions "tissue" receiving oxygen, but cells are the basic units, and oxygen is delivered to cells, not directly to tissues in this context.
2. The second option is incorrect as the molecule for chemical energy (glucose) comes from the digestive system, not the respiratory system.
3. The third option is wrong because the respiratory system provides oxygen, not the energy - carrying molecule (glucose).
4. The fourth option is correct. For organs and body systems to function, each individual cell must receive oxygen from the respiratory system. Oxygen is essential for cellular respiration, which produces the energy cells need to perform their functions, and the respiratory system is responsible for bringing oxygen into the body and distributing it to cells.

Answer:

The correct option is: each individual cell must receive oxygen from the respiratory system.