Final answer:
The 1650 invention related to blood was William Harvey's groundbreaking work on blood circulation, which provided a detailed explanation of how blood is pumped around the body by the heart, leading to modern understanding in medicine.
Step-by-step explanation:
The invention in 1650 that dealt with blood was the detailed description of blood circulation by William Harvey. In his work, Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus, Harvey was the first to accurately describe how blood travels around the body through blood vessels, outlining the systemic circulation and the role of the heart in pumping blood. This discovery was fundamental in the field of medicine and overturned centuries of misconceptions regarding how blood moved within the organisms.
Before Harvey's time, practices like bloodletting were common, based on the belief that it could treat various illnesses. The debunking of such practices and Harvey's theories on blood flow helped to pave the way for modern physiological understanding and medicine. Throughout history, advances such as the discovery of blood groups, blood transfusions, and the medical developments of antibiotics like penicillin and the safe storage of blood plasma by Charles Drew have built upon the foundational work of scientists like Harvey.