static
conductivity
Note that "electricity" doesn't flow, only current does, which is one aspect of electricity, does. Current is the flow of electrons. The main materials that do not allow the easy flow of electrons are rubber, nylon wood, glass, ceramic, plastic and free air.
Insulators are materials that prevent electrical flow.
nonconductors
The flow of energy occurs from the sun in photosynthetic organisms. Another examples is a food chain with the flow of energy from through organisms from a producer. The flow of materials describes the movement of materials or components.
While electricity doesn't flow, current does. Conductors are materials that allow the electrical currents to flow through them. Metals are the best conduction, such as silver and copper.
lava
Lymphatic vessels are the vascular tissue that only allows for one-way flow of materials.
That means that it can flow. The term "fluid" is used in general for non-solid materials, materials that can flow, such as liquid, gas, plasma, etc.
different metals
diffusion
Matter.
the cell membrane
Plasma membrane
static
conductivity