By definition, organelles are the membrane-bound structures in a cell. The nucleus is an example. Other organelles are located in the cytoplasm such as mitochondria, chloroplasts, endoplasmic reticulum, Golgi apparatus, peroxisomes, lysosomes, vacuoles and glyoxisomes.An eukaryotic cell contains many mitochondria, occupying up to a quarter of the cytoplasmic volume.he nucleus is an example. Other organelles are located in the cytoplasm such as mitochondria, chloroplasts, endoplasmic reticulum, Golgi apparatus, peroxisomes, lysosomes, vacuoles and glyoxisomes.
Enlarged bile duct symptoms vary depending upon the cause of enlargement or dilation: Gallstones in bile duct leading to its enlargement: 1  Usually there is a long history of flatulent dyspepsia (eructation).
Normal development of the ductal plate (Illustration by Aletta Frazier) Caroli Disease (2) The duct dilatation in Caroli disease is due to a congenital malformation of the ductal plate, which is the precursor of the intrahepatic bile ducts. On the left we see the normal development of the ductal plate. Embryologically each bile duct begins as a single layer of cells that surrounds a portal vein.