Branch of medicine concerned with the nature, function, and diseases of the http://www.answers.com/topic/blood . It covers the cellular and serum composition of blood, the h
…ttp://www.answers.com/topic/coagulation process, blood-cell formation, http://www.answers.com/topic/hemoglobin synthesis, and disorders of all these. http://www.answers.com/topic/marcello-malpighi , in the 17th century, was the first to examine red blood cells ( http://www.answers.com/topic/erythrocytes ). In the 18th century, the British physiologist William Hewson (1739 - 74) examined the lymphatic system and blood clotting. In the 19th century, the bone marrow was recognized as the site of blood-cell formation, and diseases of the blood such as http://www.answers.com/topic/anemia and http://www.answers.com/topic/leukemia were identified. In the early 20th century, the http://www.answers.com/topic/abo-blood-group-system-1 was discovered and the role of nutrition in blood formation was studied . (MORE)