how a river changes its characteristics when it reaches the lowland
Upland and lowland Upland habitats are cold, clear, rocky, fast-flowing rivers in mountainous areas; lowland habitats are warm, slow-flowing rivers found in relatively flat lowland areas, with water that is frequently coloured by sediment and organic matter.
Is It Fall Yet? The film chronicles the characters' summer break between seasons four and five.
Vein Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.
Strait Straits are the converse of isthmuses. That is, while a strait lies between two land masses and connects two larger bodies of water, an isthmus lies between two bodies of water and connects two larger land masses.