Fill in the blanks :  

In childhood growth is controlled by__________hormone.

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_________joins a muscle to a bone.

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The loss of body parts in self defence is called__________.

5.

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___________connects the cavity of the middle ear with the pharynx.

Answer the following

Name the area of the retina which has the brightest vision.

Answer the following

Mention one significant difference between each of the following:

Heartwood and sapwood

Mention one significant difference between each of the following:

Mention one significant difference between each of the following:

Mitral valve and Semilunar valve