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.
The four types of lipids are triglycerides, fatty acids, phospholipids, and sterols (cholesterol). Triglycerides are important for metabolism and production of energy.Fatty acids are used to make lipids in cells, attatch to phosphate groups to form phospholipids, and they are used for storage. Phospholipids are the main part of cell membranes and assist in regulating cell environment.riglycerides are important for metabolism and production of energy. Fatty acids are used to make lipids in cells, attatch to phosphate groups to form phospholipids, and they are used for storage. Phospholipids are the main part of cell membranes and assist in regulating cell environment.