Final answer:
Lipoproteins are used to move lipids around the bloodstream, and they are crucial for the transportation of insoluble lipids in the blood due to their structure of lipids conjugated with proteins.
Step-by-step explanation:
Lipids are transported around the bloodstream by lipoproteins. Lipoproteins are complexes of lipids and proteins, which are essential for transporting insoluble lipids through the hydrophilic environment of the blood.
There are various types of lipoproteins, such as chylomicrons, that are involved in the transport of lipids from digestion into the blood and to the liver.
Additionally, lipoproteins are responsible for carrying cholesterol through the bloodstream, with particles consisting of a core of glycerides and cholesteryl esters, and an outer layer of phospholipids, apolipoproteins, and cholesterol to maintain stability in the aqueous environment of the blood.