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Humana - Kentucky

Humana - Kentucky
Humana Enrollee Services (M-F 7am-7pm ET):
1 (800) 444-9137
24/7 Nurse Advice Line: 1 (800) 648-8097
24/7 Behavioral Health Crisis Line:
1 (833)-801-7355


Dictionary: Left Atrium

Left atrium: one of the four chambers of the heart. The left atrium receives blood full of oxygen from the lungs and then empties the blood into the left ventricle.

Two diagrams show the position of the heart in the body and a close-up, cross section of a healthy heart. Blood flows from the left atrium into the left ventricle and through a valve into the aorta.