Parasitism is a type of biological relationship where one organism benefits while the other is harmed.
🧬 Simple definition
Parasitism = one wins, one loses
- The parasite benefits (gets food or shelter)
- The host is harmed (loses nutrients, health, or energy)
🪱 Examples of parasitism
1. Lice on humans
- Lice live on the scalp and feed on blood
- Human gets itching and irritation
2. Tapeworms (Tapeworm infection)
- Lives in intestines
- Absorbs nutrients from food
- Can cause weight loss and weakness
3. Mosquitoes
- Female mosquitoes feed on blood
- Humans may get itching or diseases (like malaria in some regions)
4. Ticks on animals
- Attach to skin and feed on blood
- Can transmit diseases
🧠 Key features of parasitism
- Relationship is long-term or temporary
- Parasite usually does not kill the host quickly (it needs it alive)
- Parasites are often smaller than their hosts
⚖️ Difference from other relationships
- Mutualism: both benefit (e.g., bees and flowers)
- Commensalism: one benefits, other is unaffected
- Parasitism: one benefits, other is harmed
🌍 Bottom line
Parasitism is a natural survival strategy where one organism lives at the expense of another.
If you want, I can also explain parasites in humans, how they spread, and how to prevent them in simple terms.
