A vesicle can be thought of like a tiny pouch that surrounds the molecule and ushers it through an opening in the cell membrane. Examples of Selectively Permeable Membranes Selectively permeable membranes can be found around a variety of cells and places.
Weft Knitting Manufacture. Weft knitting is a knitted piece of fabric where the stitches run from left to right horizontally across the fabric. It is usually knitted with one piece of yarn, and can be made either by hand or using a knitting machine.
Double knitting. Double knitting is a form of knitting in which two fabrics are knitted simultaneously on one pair of needles. The fabrics may be inseparable, as in interlock knitted fabrics, or they can simply be two unconnected fabrics. In principle, an arbitrary number n {\displaystyle n} of fabrics can be knitted simultaneously on one pair of knitting needles with n {\displaystyle n} yarns, as long as one is careful.