Thus most of their DNA is in inactive form. Also read the information in the description window. In skeletal muscle mitochondria are less numerous than in cardiac muscle, because skeletal muscle derives energy for contraction anaerobically. Mitochondria tend to accumulate underneath the plasma membrane near the peripheral nuclei as shown in this view. The kidney collecting duct has an abundance of both.
Lysosomes are organelles of intracellular digestion.
Peroxisomes are organelles containing oxidative enzymes typically using free-radical mechanisms. To distinguish between lysosomes and peroxisomes, one needs to use histochemical methods. These are storage vesicles containing zymogens for digestive enzymes. It is filled with mucus-containing storage granules. Also look at the mast cells in this view.