Who is credited with discovering capillaries?

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Multiple Choice

Who is credited with discovering capillaries?

Capillaries are the tiny vessels that bridge arteries and veins, forming the microcirculation where exchange of oxygen, carbon dioxide, and nutrients occurs. Marcello Malpighi, using a light microscope, first described these fine vessels in 1661 by studying tissues such as the lungs and revealing a network that connected arterial and venous channels. This observation filled a crucial gap in the understanding of blood flow and provided concrete evidence for how blood travels from arteries to veins, aligning with and expanding William Harvey’s earlier circulation model. The other figures listed are known for different achievements—Edward Jenner for vaccination, and Jean Baptiste Denys and Richard Lower for early blood transfusion experiments—but they did not discover capillaries.

Capillaries are the tiny vessels that bridge arteries and veins, forming the microcirculation where exchange of oxygen, carbon dioxide, and nutrients occurs. Marcello Malpighi, using a light microscope, first described these fine vessels in 1661 by studying tissues such as the lungs and revealing a network that connected arterial and venous channels. This observation filled a crucial gap in the understanding of blood flow and provided concrete evidence for how blood travels from arteries to veins, aligning with and expanding William Harvey’s earlier circulation model. The other figures listed are known for different achievements—Edward Jenner for vaccination, and Jean Baptiste Denys and Richard Lower for early blood transfusion experiments—but they did not discover capillaries.

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