Ibn al-Nafis
A physician who was the first to accurately describe the pulmonary circulation of blood, challenging Galen's long-held theories.
Quotes by Ibn al-Nafis
Even in error, the seeker advances toward enlightenment.
The blood, after it has been refined in the right ventricle, must needs pass to the left ventricle where the vital spirit is generated. But there is no pathway between them.
The pulmonary artery, then, carries the blood to the lung, and the pulmonary vein carries the blood from the lung to the left ventricle.
There are no visible pores in the septum separating the two ventricles, and therefore the blood cannot pass through them.
The blood, after it has been refined in the right ventricle, must needs pass to the left ventricle where the vital spirit is generated. But there is no pathway between them; for the septum between them is solid and has no pores, as some have imagined.
The blood, after it has been refined in the right ventricle, must needs pass to the left ventricle where the vital spirit is generated. But there is no pathway between them; for the septum between them is solid and has no pores, as some have imagined. The blood, therefore, must needs pass from the right ventricle to the pulmonary artery, and from thence to the lungs, where it is diffused through the substance of the lungs, and then passes into the pulmonary vein to reach the left ventricle.
The heart has two ventricles, and between them there is no passage.
The blood is refined in the right ventricle, and then it must go to the left ventricle to generate the vital spirit.
The pulmonary artery carries the blood from the right ventricle to the lungs, and the pulmonary vein carries it from the lungs to the left ventricle.
The lung has a spongy texture to allow the blood to pass through it.
The air passes from the trachea to the lungs, and from the lungs to the left ventricle.
The heart is the source of all movement and life.
The brain is the seat of sensation and voluntary movement.
The liver is the organ of nutrition and blood formation.
The purpose of the arteries is to carry the vital spirit and blood to all parts of the body.
The purpose of the veins is to carry the blood to the heart.
The body is a complex machine, and each part has its specific function.
Observation and experimentation are essential for understanding the human body.
The physician must rely on his own observations and not blindly follow the ancients.
The knowledge of anatomy is fundamental to the practice of medicine.