How is air transported from alveoli to cells? b.How do mangrove trees survive in their habitat? c.We suffer from muscular cramps after strenuous exercise. Give reason.
Answers
Answer:
a. The bronchioles end in tiny air sacs called alveoli, where oxygen is transferred from the inhaled air to the blood. After absorbing oxygen, the blood leaves the lungs and is carried to the heart. The blood then is pumped through your body to provide oxygen to the cells of your tissues and organs.
b. The salt is regulated through filtration, storage and excretion. Mangroves have long underground cable roots that absorb nutrition and form a dense network contributing to its support mechanism. Many species have pneumatophores (breathing roots) to absorb atmospheric oxygen to overcome its deficiency in soil.
c. During strenuous exercise, our muscle cells run short of oxygen, as a result they breakdown the glucose to lactic acid anaerobically. When lactic acid builds up, gradually, it leads to muscle cramps and muscle fatigue.