Papillary Muscles Collection

Anatomy of heart interior, frontal section

Interior of human heart

Anatomy of human heart, cross section with detailed internal structure

Cross section of human heart

Interior view of heart with detail of muscle cells and atherosclerotic artery. Chest x-ray in background

Heart valves showing pulmonary valve, mitral valve and tricuspid

Comparison of normal heart versus heart with a patent foramen ovale

Internal view of the human heart

Interior of human heart showing atria and ventricles

Enlarged left ventricle of the human heart

Heart tendons, SEM
Heart strings. Coloured scanning electron micrograph (SEM) of the hearts chordae tendineae. These are delicate thread-like bands of fibrous tissue that attach the papillary muscles on the internal

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The papillary muscles, found within the interior of the human heart, play a crucial role in maintaining proper cardiac function. Situated in the ventricles, these specialized muscles are responsible for anchoring and controlling the movement of the heart valves. When examining a frontal section or cross-section of the human heart, one can observe these papillary muscles prominently. Their unique structure consists of small projections that extend from the walls of both ventricles towards their respective valve leaflets. These muscular extensions resemble tiny fingers reaching out to grasp and support the delicate valve apparatus. In an internal view of the human heart, one can witness how these papillary muscles connect to various valves such as pulmonary valve, mitral valve, and tricuspid valve. This intricate connection ensures that when blood is pumped through each chamber during circulation, it flows smoothly without any backflow or leakage. Furthermore, comparing a normal heart with one exhibiting a patent foramen ovale reveals how vital they can in preventing abnormal openings between chambers. They contribute to maintaining structural integrity by exerting tension on valve leaflets and closing them tightly during systole. An enlarged left ventricle may also be observed in some cases where increased workload demands greater muscle mass development. Here again, papillary muscles adapt accordingly to maintain optimal functioning despite this change.