Most reasonable answer is the swallowable camera one. mris and cat scans were invented in the 70s and the rest of the answers are around the 1800s or before.
Is composed of G1 phase<span> (</span>cell<span> growth), followed by S </span>phase<span> (DNA synthesis), followed by G2 </span>phase<span> (</span>cell<span> growth). At the end of interphase comes the mitotic </span>phase<span>, which is made up of mitosis and cytokinesis and leads to the formation of two daughter </span>cells<span>.
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Anaerobic respiration can be sustained for short periods of time because you aren’t using oxygen. We need oxygen in our body to work our muscles and pump our heart.