👉 Parasites are organisms that live on or within another organism, usually in close proximity to it. They feed on living tissue, typically by secreting enzymes or other substances into the host's cells. This allows them to replicate and spread their life cycle, often through a process called endocytosis. Parasites can cause diseases in hosts, such as those that infect the nervous system, causing paralysis or loss of sensation; others, like those that feed on blood, can lead to bleeding or