Land Area: 1  Land: 3,537,436 sq. miles (9,161,923 sq km) 2  Water: 181,274 sq. miles (469,497 sq km) 3  Total: 3,718,710 sq. miles (9,631,420 sq km)  Land Area: (individual 1  states) Land Area: (all countries)  Horizontal Width: 2,680 1  miles. Vertical Length: 1,582  miles.
Quick Answer. The smooth endoplasmic reticulum is the organelle responsible for the production of lipids in the cell. This particular reticulum also synthesizes carbohydrates and steroid hormones. The endoplasmic reticulum is made up of membranous sacs and tubules.
In fact, phospholipids are synthesized in the body to form cell and organelle membranes. In blood and body fluids, phospholipids form structures in which fat is enclosed and transported throughout the bloodstream. Sterols are the least common type of lipid. Cholesterol is perhaps the best well-known sterol. Though cholesterol has a notorious reputation, the body gets only a small amount of its cholesterol through foodâthe body produces most of it.