The Anatomy Of The Heart Essay

The Anatomy Of The Heart Essay-56
While examining the porous structure of cork, Hooke coined the term “cells” to describe the tiny rectangular holes he observed.This led scientists to adopt the concept of cells as the unit structures of tissues, which in turn led to the suggestion of cells as the building blocks of organs and to the discovery of the cell nucleus.The discovery of capillaries (small blood vessels) by Italian anatomist Marcello Malpighi (1628–1694) in 1661 provided the factual evidence to confirm Harvey’s theory of blood circulation.

While examining the porous structure of cork, Hooke coined the term “cells” to describe the tiny rectangular holes he observed.This led scientists to adopt the concept of cells as the unit structures of tissues, which in turn led to the suggestion of cells as the building blocks of organs and to the discovery of the cell nucleus.

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His 1665 publication Micrographia describes the structures of insects, fossils, and plants in detail from his microscopic studies. Anatomy is a branch of biology that deals with the structure of plants and animals.Comparative anatomy is a related field in which the structures of different animals are studied and compared.In 1543, Vesalius published one of the most important books in medical history and the world’s first textbook of anatomy, On the Structure of the Human Body.The book contains detailed anatomical descriptions of all parts of the human body, directions for carrying out dissections, and meticulously drawn illustrations.There are three main areas of anatomy: gross anatomy deals with organs and organ groupings called systems that are visible to the naked eye; cytology is the study of cell structure; and histology examines the structure of tissues.Microscopes are used in both cytology and histology to study cell and tissue structures.A later theory proposing that all of the body’s tissues are composed of cells was the basis for the science of cytology.Histology, or the study of tissues (structured groups of specialized cells), began in earnest in the 1700s with the work of French scientist Xavier Bichat (1771–1802).In his observations about the heart and blood vessels, however, Galen made critical errors that remained virtually unchallenged for 1,400 years.He mistakenly believed that blood was formed in the liver and was circulated throughout the body by the veins.

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