ingestion

(noun)

consuming something orally, whether it be food, drink, medicine, or other substance; the first step of digestion

Related Terms

Examples of ingestion in the following topics:

  • Ingestion

    • For animals, the first step is ingestion, the act of taking in food.
    • The first step in this process is ingestion: taking in food through the mouth.
    • Besides nutritional items, other substances may be ingested, including medications (where ingestion is termed oral administration) and substances considered inedible, such as insect shells.
    • The first step in obtaining nutrition is ingestion.
    • Describe the process of ingestion and its role in the digestive system

  • Tapeworms

    • Typically, transmission occurs by ingestion of a live tapeworm larva which is found in undercooked or contaminated food.
    • Humans are typically infected by ingesting infected pork.
    • The eggs can then infect cattle upon ingestion.
    • Diphyllobothrium spp, the fish tapeworm, encompasses various species that can infect humans upon ingestion of under cooked or raw fish.
    • The intermediate host is then ingested by a second intermediate host which includes the fish.

  • Aflatoxin Poisoning

    • Aflatoxin poisoning is a result of ingestion of aflatoxins produced by Aspergillus that have contaminated a food source.
    • Aflatoxin poisoning, or aflatoxicosis, occurs when there is ingestion of aflatoxin contaminated foods.
    • Upon ingestion or exposure to aflatoxin, it is common to see injury to the liver.
    • Although the liver demonstrates the ability to metabolize the ingested aflatoxins, the intermediate formed is a reactive epoxide or a less harmful hydroxylated form referred to as M1.

  • Toxoplasmosis

    • Humans may become infected as a result of infected blood transfusions, organ transplants, ingesting contaminated soil, raw or undercooked meat, and most commonly from the careless handling of cat litter, which can lead to accidental ingestion of the parasite.
    • The intermediate hosts in nature (including birds and rodents) become infected after ingesting contaminated soil, water, or plant material.
    • The oocysts, upon ingestion, will transform into tachyzoites, which will localize in the neural and muscle tissue.
    • Cats, can become infected after consuming intermediate hosts that are infected with tissue cysts or by ingesting sporulated oocysts .

  • Ergot Poisoning

    • Ergot poisoning is caused by ingestion of the alkaloids produced by the ergot fungi.
    • Ergot poisoning is a type of illness associated with the ingestion of alkaloids produced by the fungi Claviceps purpurea (C. purpurea).

  • Nematodes

    • Ascariasis is commonly found in tropical and sub-tropical regions and is transmitted by ingesting food contaminated with Ascaris eggs that are typically present in the feces of an infected individual.
    • Upon ingestion of Ascaris eggs, the larvae continue development and hatch within the intestine of the host.
    • The life cycle begins with ingestion or insertion of eggs in the anus that have been transmitted via human-to-human contact.
    • The cycle begins again once eggs are ingested and infect an additional host .

  • Invertebrate Digestive Systems

    • Ingested material enters the mouth and passes through a hollow, tubular cavity.
    • Once the food is ingested through the mouth, it passes through the esophagus and is stored in an organ called the crop; then it passes into the gizzard where it is churned and digested.
    • (a) A gastrovascular cavity has a single opening through which food is ingested and waste is excreted, as shown in this hydra and in this jellyfish medusa.
    • (b) An alimentary canal has two openings: a mouth for ingesting food and an anus for eliminating waste, as shown in this nematode.

  • Biological Effects of Radiation

    • The women, who had been told the paint was harmless, ingested deadly amounts of radium by licking their paintbrushes to give them a fine point; some also painted their fingernails and teeth with the glowing substance.
    • This can occur through inhalation, ingestion, or injection.
    • Examples of internal exposure include potassium-40 present within a normal person or the ingestion of a soluble radioactive substance, such as strontium-89 in cows' milk.
    • Especially in the case of alpha radiation, which normally does not penetrate the skin, the exposure can be much more damaging after ingestion or inhalation.

  • Regulation of Water Intake

    • Fluid can enter the body as preformed water, ingested food and drink, and to a lesser extent, as metabolic water.
    • Fluid can enter the body as preformed water, ingested food and drink, and, to a lesser extent, as metabolic water, which is produced as a by-product of aerobic respiration (cellular respiration) and dehydration synthesis.
    • In the normal resting state, input of water through ingested fluids is approximately 1200 ml/day, from ingested foods 1000 ml/day, and from aerobic respiration 300 ml/day, totaling 2500 ml/day .
    • Body water homeostasis is regulated mainly through ingested fluids, which, in turn, depends on thirst.

  • Characteristics of Helminths

    • Ascariasis is caused by ingestion of eggs from food and water contaminated with feces from humans infected with Ascaris, and ingestion allows for continuation of the life cycle.
    • The eggs will mature into an infective form in the soil and transmission occurs by ingestion of eggs in fecally contaminated food and water.