Chromatin attaches to the nuclear envelope or lamina. Golgi apparatus- receives, modifies, and dispatches proteins and lipids from the ER to other destinations. Both are sorrounded by double membranes. Chloroplasts have a fluid-filled space called the stroma, flattened sacs, called thylakoids are stacked into structures called grana. Chlorophyll is contained within the thylacoid membranes.
Mitochondria have a fluid-filled space called the matrix.
The inner membrane invaginates to form cristae. Most membrane-bounded organelles are held in place by attachment to the cytoskeleton. Organelles occupy nearly half the volume of the cell.