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.
Japanese knotweed, an escaped ornamental, is a shrubby perennial that was first introduced in the United States from Asia. It grows very aggressively along roadways, neglected gardens, streambeds, and in moist, wet places.o stop the spread of Japanese knotweed, care must be taken to prevent new plants from becoming established. New growth can sprout easily from very small fragments left behind, so when working to control or remove the plant make sure that all plant material is removed and then burned or dried.