Eukaryotic cells have bodies that wrap protein and lipid molecules in vesicles?
The phospholipid bilayer can reach out with its membrane, and
engulf proteins and lipid incoming to the cell. This is known
either as Pinocytosis or Phagocytosis- both are forms of
endocytosis of the cell.
Pinocytosis is the ingestion of dissolved materials by
endocytosis where the cell membrane invaginates and pinches off
small droplets of fluid in a pinocytotic vescile.
In Phagocytosis, the cell membrane invaginates and pinches off,
putting the proteins or lipids in a phagocyotic vacuole (endosome)
and it fuses with lysosomes that digests the contents.
Source: McGill University Physiology 209 lectures/notes
(2010)