What is a phospholipid composed of?

Phospholipids are known as a class of lipids, which contains phosphorus substance and play an important role in living cells. They are forming lipid bilayer because they have amphiphilic characteristics.

Phospholipids structure composed of hydrophilic head which is water loving and two hydrophobic tails which are water repelling in nature. Water loving part is composed of alcohol and glycerol group while the water repelling part is composed of chains of fatty acids.

Function of phospholipids:

1) It protects the cell to provide a barrier in cellular membrane and provide barrier to those organelles which are present within those cells.

2) It's provide pathways across the membrane for many substances present in the cell.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.