Answer: A) lipid bilayers
Explanation: The lipid bilayer is made up of fatty acids and amphiphilic phospholipids (hydrophilic phosphate head and a hydrophobic tail).
The lipid bilayer controls molecules, ions that goes in and out of the cell.
Cardiovascular system is also known as the circulatory system.
It's function is to make sure that the circulation of the blood pump by our heart is delivered all throughout our body to be able to give energy and more nutrients that our body needs.
