Connective tissue fills the spaces between organs. It consists of matrix fibers which are proteins that provide support for the connective tissue. There are three types:
Plus a ground substance may be fluid, gel, or solid, and, except for blood, is secreted by the cells of the connective tissue.
spirm or vaginal urea to keep the muscles cool and tender
Connective Tissue
The spaces between cells are pores or air spaces. These spaces are scientifically called intercellular or extracellular spaces or material.
this fills the space between the lens and the retina in your eyeball
Vitreous humor is a clear fluid that fills the space in your eyeball between the lens and retina.
Xylem/ Phloem/ Endodermis.
the intrapleural space is also referred to as the intrapleural cavity - the space where the major organs are fitted into and protected by the surrounding skeletal rib cage.
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.
cytoplasm
crystalline lens
cytoplasm
spongy pads
a clear gel in the eye that fills the space between the lens and the retina in your eyeball.
Nothing (unless you count electromagnetic and gravitational fields).
seafloor speading
Air.
Volume
Not all occupies space, because air does not take space.