Christian Bohr was a Danish physiologist born on October 7, 1855, known for his significant contributions to the understanding of respiratory physiology. He is best recognized for the Bohr effect, which describes how the presence of carbon dioxide and changes in pH affect the oxygen-binding affinity of hemoglobin. This phenomenon is crucial for understanding how oxygen is transported in the blood. Bohr's research laid the groundwork for further studies in respiratory physiology and has had lasting implications in fields such as medicine and sports science. He was also the father of the famous physicist Niels Bohr, who made groundbreaking contributions to quantum mechanics.