Biology : Human Organ Systems III

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1.
_______ are the main respiratory organs.

Hint

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2.
_______ is a tubular structure through which urine is excreted out of the body.

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3.
An average human adult has _______ teeth.

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4.
_______ is the organ of smell.

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5.
Complex food particles are broken into simple food particles through the process of _______.

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6.
_______ is a muscular leaf-like structure helpful in swallowing of food and speaking.

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7.
Blood is distributed to various parts of the body through blood vessels known as _______.

First letter clue

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