4.
The features of aged rat hippocampal astrocytes and neurons. (A) Astrocytes under low magnification (×6000). (B) High magnification image of the cell bodies of this astrocytes reveals mitochondria with electron-dense matrices (indicated by single arrow) (×10,000). (C) A neuron under low magnification. The single and double arrows indicate different sized giant mitochondria (X5000). (D) The cell body of this neuron shows the presence of oedema in the mitochondrial matrix (single arrows) (×15,000). N, nucleus.