Red blood cell
the biconcave shape helps it to squeeze through blood vessels smaller than itself and not get stuck inside (the lack of nucleus also helps it to do this as it has a smaller volume) and the haemoglobin causes the oxygen to stick to it to be transported to other parts of the body.
Answer;
-Myelination
Explanation;
-Myelination is the process in which neural fibers are coated with an insulating fatty sheath (called myelin) that improves the efficiency of message transfer.
-Most nerve fibers are surrounded by an insulating, fatty sheath called myelin, which acts to speed up impulses. The myelin sheath contains periodic breaks called nodes of Ranvier. By jumping from node to node, the impulse can travel much more quickly than if it had to travel along the entire length of the nerve fiber.
In addition to gases, air also contains Particles.
Answer:
True
Explanation:
A testable qustion has to be able to be tested useing experiments