chemical secretions from attack some worm parasites in the body.

The correct answer is thrombocytes.

Thrombocytes sometimes called blood platelets are an important compound of the blood. Their main role is to repair damage and prevent excessive damage when an injury occurs. Thee platelets do this by forming blood clots at the site of the injury. Recent studies have shown that these structures also have a role in the defense against parasites.

Were is the question