Search results
Results from the WOW.Com Content Network
Starch, made of amylose and amylopectin, plants energy storage. [2] Glycogen, energy in animals. [2] Cellulose, a biopolymer, found in the cell walls of plants. [2] Fatty acid, two types, saturated fat and unsaturated fat (oil), are stored energy. [2] Essential fatty acid, needed but not synthesized by the human body. [2]
Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...
Lipids (oleaginous) are chiefly fatty acid esters, and are the basic building blocks of biological membranes. Another biological role is energy storage (e.g., triglycerides ). Most lipids consist of a polar or hydrophilic head (typically glycerol) and one to three non polar or hydrophobic fatty acid tails, and therefore they are amphiphilic .
Among the many-celled groups are animals and plants. The number of cells in these groups vary with species; it has been estimated that the human body contains around 37 trillion (3.72×10 13) cells, [7] and more recent studies put this number at around 30 trillion (~36 trillion cells in the male, ~28 trillion in the female). [8]
Terpenes are major biosynthetic building blocks. Comprising more than 30,000 compounds, these unsaturated hydrocarbons are produced predominantly by plants , particularly conifers . [ 1 ] [ 2 ] [ 3 ] In plants, terpenes and terpenoids are important mediators of ecological interactions , while some insects use some terpenes as a form of defense.
As stems and roots mature lenticel development continues in the new periderm (for example, periderm that forms at the bottom of cracks in the bark). [citation needed] Lenticels are found as raised circular, oval, or elongated areas on stems and roots. In woody plants, lenticels commonly appear as rough, cork-like structures on young branches.
Metabolism (/ m ə ˈ t æ b ə l ɪ z ə m /, from Greek: μεταβολή metabolē, "change") is the set of life-sustaining chemical reactions in organisms.The three main functions of metabolism are: the conversion of the energy in food to energy available to run cellular processes; the conversion of food to building blocks of proteins, lipids, nucleic acids, and some carbohydrates; and the ...
Elements and atoms: The building blocks of matter-- Chemial bonds-- Chemical reactions-- Inorganic compounds essential to human functioning: Buffer solution: Added reference Diff: Organic compounds essential to human functioning: Phosphorylation: Added reference Diff