Answer:
go for the second answer idk may be right i think
Explanation:
<span>It is true, dural sinuses, cerebral sinuses, or cranial sinuses are venous channels found between the endosteal and meningeal layers of dura mater in the brain. They receive blood from internal and external veins of the brain,and receive cerebrospinal fluid (CSF) from the subarachnoid space via arachnoid granulations, and mainly empty in the internal jugular vein</span>
The stage of Cellular Respiration in which the most carbon dioxide is produced would be the second stage, or "Citric Acid Cycle"
Let me know if this helped
It is A Oxygen for the Answer.