Answer:
A. Obtaining nutrients and getting rid of waste
Answer:
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Explanation:
Answer:
C. When the chest volume expands, air can now rush in through the puncture without filling the alveoli.
Explanation:
During inhalation, the contraction of the diaphragm and the external intercostals increase the volume of the chest cavity. As the chest cavity expands, the alveolar pressure become lower than the atmospheric pressure resulting in the flow of air into the lungs in response to the pressure gradient.
The chest cavity is an airtight chamber. This ensures that any changes in the volume of are chest cavity corresponds to the volume of the lungs. If a lung is punctured, the air would not fill the punctured lung but would escape through the hole. Therefore, the punctured lung would not be filled with air during inhalation.
The life-form during the Precambrian time was cyanobacteria.
Answer:
Differences are given below.
Explanation:
The main difference in the human and mouse skin is the number of layers i e. human skin have 6 to 10 layers of epidermis while mouse has only 3 layers. Worm has 302 neurons in its nervous system as compared to the 86 billion neurons present in human body because of difference in size. the main difference in human and fly muscles is that fly has strong muscle responsible for flight in the air while human has no flight muscles. The main difference of human and frog blood is the red blood cells. human has RBC with no nucleus while frog has red blood cells having nucleus.