eMedlas - anatomy & histology
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Heart muscle in cross section (HE)

 

1. nucleus, as much shorter than the cells, it is seen only in a part of the cross sections

1. nucleus, as much shorter than the cells, it is seen only in a part of the cross sections

2. myofibril-free area at the ends of the nucleus, here lipofuscin granules can accumulate

2. myofibril-free area at the ends of the nucleus, here lipofuscin granules can accumulate

3. nucleus-free segment of a heart muscle cell

3. nucleus-free segment of a heart muscle cell

4. cell branching, it appears as a characteristic irregular profile in cross section

4. cell branching, it appears as a characteristic irregular profile in cross section

5. spaces in the cellular network, containing capillaries and fibrocytes

5. spaces in the cellular network, containing capillaries and fibrocytes

 
The index numbering of the characteristic profiles in the cross section of the heart muscle is identical with that of the corresponding areas in the longitudinal sections. The irregular profiles of the cross sections at the branching points of the cells distinguish the heart muscle from the smooth and striated muscles in cross sections.
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