Slower rate of transmission - this is because it cannot carry out saltatory conduction. Myelin insulates nerve cells along the axon and is present as Schwann Cells on the outer membrane. It allows saltatory conduction to take place as the impulse can just from one Schwann Cell to the next without having to travel the whole length of the axon - but this cannot take place in unmyelinated neurones.
The two substances are rock (molten and solid) and metal (solid + liquid).
Layers of the earth from the outside in:
1. crust. hard rock/dirt/ground. Shell
2. mantle. melted rock and stuff. Egg white
3. core. Outer core - liquid. Inner core- solid. Nickle and iron. Yolk
Blood, the carrier of nutrients, wastes, and gases, circulates within blood vessels through the body, exchanging materials with the interstitial fluid.
Interstitial fluid, formed by filtration from blood, is the fluid surrounding body cells in the tissue spaces and is essential to proteinless plasma.
Lymph is the protein-containing fluid that enters the lymphatic capillaries (from the tissue spaces); hence, its composition is the same as that of the interstitial fluid.