The blood brain barrier
The affirmation is correct.
The company known as Thomas Exchange Global facilitates foreign currency exchanges and allows you to order and transfer money at some of the best exchange rates available.
The exchange of gluons between protons and neutrons which allows protons of the same charge to be so close to each other in the nucleus (ie, Strong force is greater than electromagnetism)
Some fungi allow an exchange of nutrients between the plant and fungi such as phosphate and nitrates. The fungi also allows for defense against certain insects and pests.
The blood brain barrier is actually a physical barrier (made of tight junctions of cells/capillaries) that provides a filtering mechanism for the blood carrying stuff to the brain and spinal cord. It only allows certain things to get in and out of the brain and spinal cord.
stomata
The connection that is a nonphysical connection between sender and receiver that allows an exchange of commands and responses is known as telepathy. Telepathy allows real-time communication without using any sensory channels.
An open system allows for the exchange of matter and energy between the system and outside of the system. A closed system only allows the exchange of energy; not matter.
Stomata and lenticells
It happens in the alveoli of the lungs
placenta
placenta
FireWire is a technology that allows high-speed communication. It is a data exchange between two computers of between one computer and a peripheral.
goverment
Diffraction
Residual volume allows gas exchange to go on continuously
gas exchange to take place/to allow cells to lose CO2 and gain O2 so they will be oxygenated and ready to be pumped around your body.