To show that lines are parallel, we draw small arrow marks on them. In the figure above, note the arrows on the lines PQ and RS. When we write about parallel lines there is a shorthand we can use. We can write which is read as the line segment PQ is parallel to the segment RS.
Lysosome[edit] Lysosomes are spherical bodies, or vacuoles that are enclosed by a single membrane. The membrane serves as a protectorate to the cell, since lysosomes contain harsh digestive enzymes, which would cause significant damage if exposed to cell content.
Lysosome. Within eukaryotic cells are specialized vesicles called lysosomes that contain digestive enzymes. These enzymes break down foreign material which may enter the cell. The name lysosome means releasing body and their enzymes cause lysis or disintegration of certain materials.They can be used to break down worn-out cellular components or bacteria engulfed by the cell.ithin eukaryotic cells are specialized vesicles called lysosomes that contain digestive enzymes. These enzymes break down foreign material which may enter the cell.