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.
2 Similar species Several other knotweed species are similar to Japanese knotweed. All are invasive non-natives, and control methods discussed here are appropriate for all three species.Giant knotweedGiant knotweed (Fallopia sachalinensis) is larger than Japanese knotweed, often reaching 4m (13 ft) in height. Similar species Several other knotweed species are similar to Japanese knotweed. All are invasive non-natives, and control methods discussed here are appropriate for all three species.Giant knotweedGiant knotweed (Fallopia sachalinensis) is larger than Japanese knotweed, often reaching 4m (13 ft) in height.