Recording-2025-03-10T21_19_03

Heart

The organ that functions as a pump to circulate blood throughout the body.

Mediastinum

The region of the thorax between the lungs that contains the heart, aorta, and other structures.

Visceral layer

The inner layer of the pericardium that is in direct contact with the heart.

Myocardium

The muscular tissue of the heart responsible for contraction.

Atria

The two upper chambers of the heart that receive blood returning from the body.

Ventricles

The two lower chambers of the heart that pump blood out of the heart.

Chordae tendineae

Tendons that connect the papillary muscles to the heart valves, preventing backflow of blood.

Pacemaker cells

Cells that initiate electrical impulses in the heart, setting the rhythm of contractions.

Pericardium

The double-walled sac containing the heart and the roots of the great vessels.

Epinephrine

A hormone that increases heart rate and contractility, often associated with the body's 'fight-or-flight' response.