Examlex
An atom's ________ are found in its nucleus.
Epicardium
The outermost layer of the heart's wall, composed of connective tissue and fat, providing protection and contributing to the heart's lubricative fluid.
Four-Chambered
Refers to the structure of the heart, which consists of four chambers: two atria and two ventricles.
Pulmonary Veins
Blood vessels that carry oxygenated blood from the lungs back to the left atrium of the heart.
Fibrous Pericardium
The outer layer of the heart's pericardium, consisting of tough connective tissue that protects the heart and anchors it within the chest.
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