What is the full definition of: mitochondria

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

Time ! for a smell to begin the process of registering in your brain, first you must a) inhale odor molecules into the nasal cavity b)transduce scent chemicals c)have a scent to inhale d)all answers can work

Why do mountaineers become breathless as they reach high altitudes