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Gallbladder is situated in liver , which fills the space .
The stroma
Cytoplasm is the fluid substance that fills the space between the cell membrane and the cellular organelles. The cytoplasm contains enzymes that control chemical reactions inside cells.
crystalline lens
Xylem/ Phloem/ Endodermis.
spongy pads
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other organs of the body get into that space
There is nothing that fills the space between neutrons and electrons. There may be a couple of other particles, but they do not come close to filling the space.
→ layers from alveolus to capillary ①surfactant layer (inside alveolus) ②pneumocyteⅠ(typeⅠ cell) layer ③fused basal lamina (consists of basal laminae of alveolar epithelium and capillary endothelium) ④endothelium (inside capillary)
Volume
Not all occupies space, because air does not take space.
plaster.
Gas diffuses in space.
That is called the volume.