Schematic two-dimensional cross-sectional view of<unk> : A core protein of<unk> in is surrounded by branches of glucose units. The entire globular granule may contain around 30,000 glucose units. A view of the atomic structure of a single branched strand of glucose units in a<unk>  molecule.<unk>  (black granules) in spermatozoa of a flatworm; transmission electron microscopy, scale: 0.3 μm<unk>  is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals, fungi, and bacteria. The polysaccharide structure represents the main storage form of glucose in the body.<unk>  functions as one of two forms of energy reserves,<unk>  being for short-term and the other form being triglyceride stores in adipose tissue (i.e., body fat) for long-term storage. In humans,<unk>  is made and stored primarily in the cells of the liver and skeletal muscle. In the liver,<unk>  can make up 5–6% of the organ's fresh weight, and the liver of an adult, weighing 1.5 kg, can store roughly 100–120 grams of<unk> . In skeletal muscle,<unk>  is found in a low concentration (1–2% of the muscle mass) and the skeletal muscle of an adult weighing 70 kg stores roughly 400 grams of<unk> . The amount of<unk>  stored in the body—particularly within the muscles and liver—mostly depends on physical training, basal metabolic rate, and eating habits (in particular oxidative type 1 fibres). Different levels of resting muscle<unk>  are reached by changing the number of<unk>  particles, rather than increasing the size of existing particles though most<unk>  particles at rest are smaller than their theoretical maximum. Small amounts of<unk>  are also found in other tissues and cells, including the kidneys, red blood cells, white blood cells, and glial cells in the brain. The uterus also stores<unk>  during pregnancy to nourish the embryo. Approximately 4 grams of glucose are present in the blood of humans at all times; in fasting individuals, blood glucose is maintained constant at this level at the expense of<unk>  stores in the liver and skeletal muscle.<unk>  stores in skeletal muscle serve as a form of energy storage for the muscle itself; however, the breakdown of muscle<unk>  impedes muscle glucose uptake from the blood, thereby increasing the amount of blood glucose available for use in other tissues. Liver<unk>  stores serve as a store of glucose for use throughout the body, particularly the central nervous system. The human brain consumes approximately 60% of blood glucose in fasted, sedentary individuals.<unk>  is the analogue of starch, a glucose polymer that functions as energy storage in plants. It has a structure similar to amylopectin (a component of starch), but is more extensively branched and compact than starch. Both are white powders in their dry state.<unk>  is found in the form of granules in the cytosol/cytoplasm in many cell types, and plays an important role in the glucose cycle.<unk>  forms an energy reserve that can be quickly mobilized to meet a sudden need for glucose, but one that is less compact than the energy reserves of triglycerides (lipids). As such it is also found as storage reserve in many parasitic protozoa.
Glycogen
Glabrene
Cholesterol
Glycoside
Cerebroside
Iminosugar
Hematogen
Inositol