The direction of the prevailing winds vary with latitudes.
Producers bring energy into the ecosystem by making organic molecules from sunlight or chemical compounds. Producers bring new energy into an ecosystem by breaking down inorganic materials and making new ones.
The herbaceous stem is composed of vascular bundles (xylem and phloem) arranged in a circle around a central core of spongy tissue made up of parenchyma cells, called the pith. Surrounding the vascular bundles is a layer known as the cortex, which varies in thickness from species to species.
The lymphatic system<span> has multiple interrelated </span>functions<span>: It is responsible for the removal of interstitial fluid from tissues. It absorbs and transports fatty acids and fats as chyle from the digestive </span>system<span>. It transports white blood cells to and from the </span>lymph<span> nodes into the bones.</span>
