Due to the Expansion of Commerce and the Availability of Cheap

question 20

True/False

Due to the expansion of commerce and the availability of cheap and nutritious food,the largest European cities boasted populations in excess of over one million people by 1300.

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Definitions:

Chordae Tendineae

Tendon-like cords in the heart that connect the papillary muscles to the tricuspid valve and the mitral valve, preventing their inversion during contraction.

Trabeculae Carneae

Irregular muscular columns that line the interior walls of the ventricles of the heart.

Pectinate Muscles

Internal ridges of myocardium in the atria of the heart.

Visceral Pericardium

The inner layer of the pericardium that closely envelopes the heart.