What is cannabis?
Cannabis is a flowering plant in the genus Cannabis whose female flowers produce a resin rich in chemical compounds called cannabinoids. The two best known are delta-9 tetrahydrocannabinol (THC), which causes intoxication, and cannabidiol (CBD), which does not.
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People use cannabis for relaxation, pain relief, sleep and appetite, and for medical conditions such as chemotherapy-induced nausea and some severe forms of epilepsy. Federal law in the United States still classifies cannabis containing more than 0.3 percent THC as a Schedule I controlled substance, while many states permit medical or adult use.
what is cannabis and how does it work
How does cannabis work in the body?
THC works by binding to cannabinoid receptors in the endocannabinoid system, a signaling network that helps regulate mood, memory, appetite, pain, sleep and immune response. CB1 receptors cluster in the brain and central nervous system, which is why THC alters perception, memory and coordination. CB2 receptors sit mostly in immune and peripheral tissue and play a larger role in inflammation.
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CBD binds these receptors weakly and instead influences other targets, including serotonin and vanilloid pathways, so it can ease anxiety or seizures without producing a high. Terpenes, the aromatic oils in the plant, shape scent and may modify how a given cultivar feels.
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How fast do effects start and how long do they last?
Inhaled cannabis reaches the bloodstream in about 5 to 10 minutes, peaks within 30 minutes, and fades over 1 to 3 hours. Edibles and drinks pass through the liver first, so onset takes 30 to 120 minutes and effects can last 4 to 8 hours or longer. That delay is the main reason people sometimes consume far more THC than intended.
Why does convenience shape how cannabis works?
Product format changes the experience as much as the chemistry does. A joint, a vape pen and a fast-acting nano-emulsified gummy can deliver similar THC doses with very different timing, control and predictability.
Shoppers often pick formats that remove steps: pre-rolls, single-dose pens, dissolvable tablets and beverages with onset in 15 to 30 minutes. Convenience shapes perceived effects because it shapes dose accuracy and how soon a person notices a change.
Is cannabis the same as marijuana and hemp?
All three come from the same plant genus. Marijuana is a colloquial term for cannabis cultivars high in THC, while hemp is defined in US law as cannabis containing 0.3 percent THC or less by dry weight.
What determines how strong the effects feel?
- Total THC dose and the ratio of THC to CBD
- Delivery method: inhalation, oral, sublingual or topical
- Individual factors such as tolerance, body weight, liver enzymes and genetics
- Terpene profile and the presence of other cannabinoids
Key takeaways
- Cannabis is a plant that produces cannabinoids, chiefly THC and CBD.
- THC binds CB1 receptors in the endocannabinoid system to produce intoxication.
- Onset ranges from minutes when inhaled to two hours when eaten.
- Format and convenience influence timing, dose control and the overall experience.