Mitochondria are surrounded by membranes.They have two membranes.
The potential space between the pleural membranes is called the thoracic cavity. This is also known as the pleural cavity in some instances.
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The subarachnoid space is a space filled with cerebrospinal fluid located between the arachnoid mater and pia mater membranes that surround the brain and spinal cord. It serves as a protective cushion and helps with the circulation of cerebrospinal fluid.
The pleural cavity is called a potential space because under normal conditions, there is a small amount of lubricating fluid present that allows the layers of the pleura to slide smoothly over each other during breathing. This space does not normally contain air or excess fluid, but it has the potential to accumulate air or fluid in certain abnormal situations.
Pericardial cavity
The two pleural membranes should be touching. If air creates a space between them the air will push the lung down and prevent it from filling with air. This is known as a collapsed lung, or pneumothorax. The air between the pleural membranes must be removed to reinflate the lung.
Mitochondria are surrounded by membranes.They have two membranes.
It is an area that exists between two layers of coverings (membranes) that wrap around the brain
The potential space between the pleural membranes is called the thoracic cavity. This is also known as the pleural cavity in some instances.
It is called Negative Space.
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A mitochondrion consists of outer and inner membranes, an intermembrane space (space in between the membranes), the cristae (infoldings of the inner membrane), and the matrix (space within the inner membrane). The outer membrane contains several porins that form channels. This also contains its' own DNA.
The internode space. The space between the two leafe nodes. The spaces between leaf veins are called areoles.
A synapse.
The space between planets is known as interplanetary space. It is mostly vacuum but can contain small amounts of particles and gases.
There is a inner and outer membrane are between an egg shell and the egg white. The membranes are separated by an air cell.