Ответ In the 20th century anatomy became an exact science

Ответ 1. In the 20th century anatomy became an exact science. 

Ответ 2. But in 1968 Prof. Seraphima Samoilova began to study the heart vessels. 

Ответ 3. But nobody

has studied the heart vessels.

Ответ 4. Prof. Samoilova determined that the heart consisted of thin vascular tubes. Bands of vessels compose a half of the heart weight. She came to the conclusion that the heart was a dilated large vessel included in muscular tissues.

Ответ 5. The structure of the heart as a band of vessels is very intricate and varies with age and diseases.

Ответ 6. Seraphima Samoilova included all the findings of her research work into the book called “The Anatomy of Cardiac Blood Vessels”. It helps the surgeon to perform operations on the heart.