As in other mammals, thermoregulation is an important aspect of human homeostasis. Most body heat is generated in the deep organs, especially the liver, brain, and heart, and in contraction of skeletal muscles. Humans have been able to adapt to a great diversity of climates, including hot humid and hot arid.
Japanese knotweed is a perennial weed, producing tall canes, up to 2.1m (7ft) in height during the summer. The canes have characteristic purple flecks, and produce branches from nodes along its length. These branches support shovel-shaped leaves.
The Knotweed Family is one of the few dicots that have flowers in 3s or 6s. 1  Individual flowers are very small. 2  Wild Buckwheat is an off-white color and is common in the foothills and montane zones. 3  Alpine Sulfur Flower forms mats. It is found in gravelly, rocky areas above timberline.