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Ingestable toxins are also often referred to as poisons, especially when intentionally administered by a human. Animal toxins that are delivered subcutaneously (e.g. by sting or bite) are also called venom. In normal usage, a poisonous organism is one that is harmful to consume, but a venomous organism uses poison to defend itself while still alive. A single organism can be both venomous and poisonous.
In most cases the quantity of material is related to its toxicity. Even a material such as water, which is normally considered non-toxic, can be toxic when ingested in sufficient quantity. Toxicity is measured in terms of the amount of the particular material that is needed to kill half the organisms in the test, which is called the LD50.
Some dietary mineralDietary minerals are chemical elements required by living organisms. They can be either bulk minerals (required in relatively large amounts) or trace minerals (required only in very small amounts). Appropriate intake levels of each dietary mineral must bes are actually nutrientNutrients and the body A nutrient is any element or compound that is necessary for or contributes to an organism's metabolism, growth, or other functioning. There are six nutrient groups and these can be divided into those that provide energy and those ths for plantGreen algae land plants (embryophytes non-vascular embryophytes Hepatophyta liverworts Anthocerophyta hornworts Bryophyta mosses vascular plants (tracheophytes seedless vascular plants Lycopodiophyta clubmosses Equisetophyta horsetails Pteridophyta "true"s, animalSubkingdom Parazoa Porifera (sponges) Subkingdom " Agnotozoa" Placozoa Orthonectida Rhombozoa Subkingdom Metazoa "Radiata" Cnidaria Ctenophora (comb jellies) Bilateria Protostomia Acoelomorpha Platyhelminthes (flatworms) Nemertina (ribbon worms) Gastrotris, or humanHuman beings are defined variously in biological, spiritual, and cultural terms, or in combinations thereof. Biologically, they are classified as Homo sapiens ( Latin for knowing man , a primate species of mammal with a highly developed brain. In spirituas at minute levels, but become toxic when the quantity is larger. Many plants, animals and microorganismA micro-organism or microbe is an organism that is so small that it is invisible to the naked eye. The term is synonymous by usage to single- celled organism and unicellular organism even though some unicellular protists are visible to the naked eye, ands generate toxins to discourage or kill predators. Food poisoning is a term for a broad range of illnessIllness can be a synonym for disease or it can be a person's perception of having poor health. Disease is an actual physical, pathophysiological process which can cause an abnormal condition of the body or mind. See disease for more information. Illness aes that can result from eating food that is spoiled or tainted by bacterial toxins, such as endotoxinEndotoxin is part of the outer membrane of the cell wall of Gram-negative bacteria. It refers to the lipopolysaccharide (LPS) complex associated with the outer membrane of Gram-negative bacteria. LPS is also called endotoxin owing to its historical discov, botulinum, and the so-called Shiga-like toxin secreted by the emergent E. coli strain .
Naturally occurring or human-modified toxins may be intentionally released by humans in chemical warfare.
To see a list of biologically injurious substances, including toxins and other materials, as well as their effects, see poison.
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