Breathing on the brain

As easy as breathing? It may seem like it, but breathing is actually no easy process. It involves the precise integration of several systems, including, of course, the pulmonary and cardiovascular systems (gas exchange and transport, respectively). However, it also requires the direct involvement of the central nervous system: the brain. The drive to breathe … Continue reading Breathing on the brain

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Hemoglobin: a gamechanger

The supply of oxygen (O2) is crucial for life and there are two ways O2 can be carried in blood: dissolved or combined with hemoglobin. Dissolved O2 can only supply a fraction of what the human body needs. One mL blood holds only about 0.003 mL O2 at a partial pressure of oxygen (PO2) of … Continue reading Hemoglobin: a gamechanger