____-prevents the bones from injury.

Which protects the embryo from external injury

During swallowing _________ prevents food from entering wind pipe and ______ prevents it from entering nasal cavity.

During swallowing _________ prevents food from entering wind pipe and ______ prevents it from entering nasal cavity.

Differentiate bones from cartilage.

…………………membranes protect the brain from mechanical injury.

Apples are generally wrapped in waxed paper to (a)prevent sunlight for changing its colour (b)prevent aerobic respieration by checking the netry of (c )prevent ethylene formation due to injury (d)make the apples look attractive