Whales are mammals that breathe into the lungs. Whales contain blow .pdf

Whales are mammals that breathe into the lungs. Whales contain blow hole or nostril on the top
or back of their head. When whales are in water, the blow hole is covered with a muscular flap.
When they come to water surface, the flap is opened and exhale the air which occurs as a blow or
stream of misty air. Then they inhale the air. The process may take place few seconds. Again, the
blowhole is closed with the flap and indicates that whale is in relaxed position. Since, whales
cannot breathe through the mouth like other mammals because their esophagus is not connected
to lungs. The blow hole leads to trachea and from the hole, the air enters the lungs. The hole is
opened only when the whales come onto water surface and hole is closed with muscular flap
when they are in water and relaxed.
Solution
Whales are mammals that breathe into the lungs. Whales contain blow hole or nostril on the top
or back of their head. When whales are in water, the blow hole is covered with a muscular flap.
When they come to water surface, the flap is opened and exhale the air which occurs as a blow or
stream of misty air. Then they inhale the air. The process may take place few seconds. Again, the
blowhole is closed with the flap and indicates that whale is in relaxed position. Since, whales
cannot breathe through the mouth like other mammals because their esophagus is not connected
to lungs. The blow hole leads to trachea and from the hole, the air enters the lungs. The hole is
opened only when the whales come onto water surface and hole is closed with muscular flap
when they are in water and relaxed..

1. Whales are mammals that breathe into the lungs. Whales contain blow hole or nostril on the top
or back of their head. When whales are in water, the blow hole is covered with a muscular flap.
When they come to water surface, the flap is opened and exhale the air which occurs as a blow or
stream of misty air. Then they inhale the air. The process may take place few seconds. Again, the
blowhole is closed with the flap and indicates that whale is in relaxed position. Since, whales
cannot breathe through the mouth like other mammals because their esophagus is not connected
to lungs. The blow hole leads to trachea and from the hole, the air enters the lungs. The hole is
opened only when the whales come onto water surface and hole is closed with muscular flap
when they are in water and relaxed.

Solution

Whales are mammals that breathe into the lungs. Whales contain blow hole or nostril on the top
or back of their head. When whales are in water, the blow hole is covered with a muscular flap.
When they come to water surface, the flap is opened and exhale the air which occurs as a blow or
stream of misty air. Then they inhale the air. The process may take place few seconds. Again, the
blowhole is closed with the flap and indicates that whale is in relaxed position. Since, whales
cannot breathe through the mouth like other mammals because their esophagus is not connected
to lungs. The blow hole leads to trachea and from the hole, the air enters the lungs. The hole is
opened only when the whales come onto water surface and hole is closed with muscular flap
when they are in water and relaxed.