axon
blood
bone
Bowman’s capsule
cardiac muscle
cartilage
cell body
central nervous system
collagen
conformer
connective tissue
connective tissue proper
dendrite
ectotherms
effector
elastin
endocrine gland
endotherms
epithelial tissue
epithelium
exocrine gland
extracellular fluid
filtrate
gland
glial cells
glomerulus
heat stroke
heterotherm
hibernate
homeostasis
homeotherm
hyperthermia
hypothermia
interstitial fluid
ligament
matrix
muscle fiber
muscle tissue
negative feedback
nephron
nervous tissue
neuroglia
neuron
organ
organ system
osmoconformer
osmoregulation
osmoregulator
peripheral nervous system
physiology
positive feedback
regulator
set point
skeletal muscle
smooth muscle
special connective tissue
tendon
thermoneutral zone
thermoregulation
tissue
A bison crossing the Mammoth Springs in Yellowstone National Park. When they are exposed to extreme low temperatures (as low as –30°C) and windy conditions, bison increase their heart rate slightly, enabling them to maintain a relatively constant body temperature.
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