take the top of the hanging piece of tie and thread it through the loop created at the back 3 first loop to form the front loop of the bow double up the shorter end placing across the collar and hold in place with your forefinger 6 knot and tighten once through even out the ends and tighten
Cells that engulf and digest bacteria and other foreign substances  as well as debris from dead cells are called macrophage. Macrophage  also stimulate white blood cells to â¦respond to pathogens.
Lysosomes and peroxisomes (illustration) These organelles are the recycling center of the cell. They digest foreign bacteria that invade the cell, rid the cell of toxic substances, and recycle worn-out cell components. Mitochondria are complex organelles that convert energy from food into a form that the cell can use. They have their own genetic material, separate from the DNA in the nucleus, and can make copies of themselves. Nucleus. The nucleus serves as the cellâs command center, sending directions to the cell to grow, mature, divide, or die. It also houses DNA (deoxyribonucleic acid), the cellâs hereditary material.