![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Glycogen
Nearly all cells contain some amount of glycogen; however, glycogen accumulations are commonly seen in very active cells, such as this cardiac muscle cell. In this electron micrograph, glycogen is present between the bundles of contractile filaments which fill the cytoplasm. 15,000x
![Glycogen granules <p>Nearly all cells contain some amount of glycogen; however, glycogen accumulations are commonly seen in very active cells, such as this cardiac muscle cell. In this electron micrograph, glycogen is present between the bundles of contractile filaments which fill the cytoplasm. 15,000x</p>](https://digitalhistology.org/wp-content/uploads/2017/05/C.S.Gly-7-1-ping.png)
Glycogen granules
Nearly all cells contain some amount of glycogen; however, glycogen accumulations are commonly seen in very active cells, such as this cardiac muscle cell. In this electron micrograph, glycogen is present between the bundles of contractile filaments which fill the cytoplasm. 15,000x
![Bundles of contractile proteins (myofibrils) <p>Nearly all cells contain some amount of glycogen; however, glycogen accumulations are commonly seen in very active cells, such as this cardiac muscle cell. In this electron micrograph, glycogen is present between the bundles of contractile filaments which fill the cytoplasm. 15,000x</p>](https://digitalhistology.org/wp-content/uploads/2017/05/C.S.Gly-7-2-ping.png)
Bundles of contractile proteins (myofibrils)
Nearly all cells contain some amount of glycogen; however, glycogen accumulations are commonly seen in very active cells, such as this cardiac muscle cell. In this electron micrograph, glycogen is present between the bundles of contractile filaments which fill the cytoplasm. 15,000x
![Mitochondria <p>Nearly all cells contain some amount of glycogen; however, glycogen accumulations are commonly seen in very active cells, such as this cardiac muscle cell. In this electron micrograph, glycogen is present between the bundles of contractile filaments which fill the cytoplasm. 15,000x</p>](https://digitalhistology.org/wp-content/uploads/2017/05/C.S.Gly-7-3-ping.png)
Mitochondria
Nearly all cells contain some amount of glycogen; however, glycogen accumulations are commonly seen in very active cells, such as this cardiac muscle cell. In this electron micrograph, glycogen is present between the bundles of contractile filaments which fill the cytoplasm. 15,000x