Gametes, spores I think. I'm pretty sure that's it.
<span>Mannitol reduces the intracranial hypertension in patients with head injury. this chemical which is a sugar- alcohol lowers the viscosity of the blood and thus reducing the blood volume. Head injury may lead to increased intracranial pressure and volume. It is also believed that mannitol acts by reducing brain water.</span>
Oxygen
Oxygen is the final electron acceptor, no part of the process - from the Krebs Cycle through the electron transport chain- can happen without oxygen. Aerobic respiration is complete
