Name:_________________________		Date:_______________
Cloze Passage (4.6) Read the passage carefully and fill in the blanks with the most suitable word. EXTRA SENSES

Apart ______________ their usual sense organs, animals often develop special sense organs. These ___________ give them extra sensitivity and information about the ___________ around them and are often needed for survival. Dogs have the most amazing sense of ____________. Inside a dog's muzzle, there is a large space that _____________ scents and passes the sensory information to the ___________. Moisture inside the nose ______ to dissolve scent particles, this enhances detection of the smell. Interpreting scents takes up a large ____________ of a dog's brain activities. Snakes have an organ at the roof of their mouths ___________ the Jacobson's organ. A snake collects chemical particles ________ its tongue and transfers them to sensory _________________ in the Jacobson's organ for the chemicals to be detected. Human beings do not develop extra sense organs. Often when one of the senses is _____________, the other senses can become more sensitive to overcome deficiencies.

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