Leech - In general — task. Science TNSB Mentoring, Class 10 Crash course.

State whether the given statement is true or false, with appropriate justification:

1. In leeches, salivary glands are housed by papillae.

The jaws are equipped with papillae, which house the salivary gland openings.
Papillae are rounded projections adapted to hold salivary glands.

2. Leeches help to humans during plastic surgeries.

Leech will inject an anaesthetic substance which makes the person unconscious.
Leech prevents clotting of blood and it enables the tissue for the auto repair.

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