Give reasons for the following statement:
The opening of windpipe is guarded by a muscular flap.
Windpipe:
The upper opening of the windpipe is guarded by a muscular flap called
Give one word for the following.
A muscular flap which guards the opening of wind pipe.
The front opening of the windpipe is guarded by ___________.
The upper opening of the windpipe is guarded by the ...............