What are internal and external parasites
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External parasites are almost always blood feeders, drawing on the host's blood to survive. External parasites almost always feed for relatively short times, taking what they need and then moving on. Some stay with a single host for long periods of time, and some smaller external parasites attempt to live on a host permanently.
Internal parasites generally stay with their host longer than external parasites. The life cycle of the internal parasite requires that they spend at least some time in a host's body, before moving on or dying. Some internal parasites stay within a host for most of their lives. Many prefer a certain tissue to live in, such as the digestive system or the vascular system.
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External Parasites
External parasites are almost always blood feeders, drawing on the host's blood to survive. External parasites almost always feed for relatively short times, taking what they need and then moving on. Some stay with a single host for long periods of time, and some smaller external parasites attempt to live on a host permanently.
Internal ParasitesInternal parasites generally stay with their host longer than external parasites. The life cycle of the internal parasite requires that they spend at least some time in a host's body, before moving on or dying. Some internal parasites stay within a host for most of their lives.
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