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.
Â© Cheryl C. Fall, Licensed to About.com. Definition: The terms warp and weft refers to the threads that make up a loomed or woven fabric. Warp threads are the vertical threads that run along the length of the yardage. Weft threads are the horizontal threads that run from selvage to selvage (side to side).