The outer membrane is smooth while the inner is folded, these folds are called cristae. The area between the 2 membranes is called the inner membrane space. The inner most area of the mitochondrion is called the mitochondrial matrix. Chloroplast measure 2um- 5um in diameter. It is a double membrane structure.
Microtubules function in shape, support, and help move organelles around the cell.
They function in muscle contraction, cytoplasmic streaming, ameboid movement, and changes in cell shape. This is made of sticky oligosaccharides that act as glue to keep the cells together. Tight junctions . These bind the cells together like rivets. They let material pass through the intracellular spaces.