Question

Как известно, лягушка в основном дышит кожей и на суше, и в воде. У человека через кожу тоже идёт довольно интенсивный газообмен. Почему же мы не можем без лёгких? Ведь тогда мы могли бы дышать под водой! Постарайтесь назвать две причины.

Answer 1

Ответ:

1)У лягушек недостаточно розвинуты лёгкие, а кожа помогает им адаптироваться и дышать

2)Газообмен между организном и средо возможен только через плёнку на коже, а у нас такой слишком плёнки нет

Answer 2

Why Humans Can't Breathe Without Lungs

Humans cannot breathe without lungs due to two main reasons:

1. Lack of Surface Area for Gas Exchange: - While it is true that humans have some gas exchange through the skin, it is not sufficient for meeting the body's oxygen demands. The surface area of the skin is not large enough to facilitate the necessary gas exchange for sustaining human life. - According to a study, "the skin is not a major site of gas exchange in humans".

2. Inability to Extract Sufficient Oxygen from Water: - Even if humans were able to extract some oxygen through the skin, it would not be enough to sustain life underwater. The amount of dissolved oxygen in water is not sufficient to meet the oxygen demands of the human body. - Additionally, the respiratory system, including the lungs, is specifically adapted to efficiently extract oxygen from the air and expel carbon dioxide, a process that cannot be replicated by skin alone. - The respiratory system is essential for the efficient exchange of gases, and without it, humans would not be able to extract enough oxygen from the environment to survive.

In summary, while some gas exchange occurs through the skin, it is not enough to sustain human life, and the respiratory system, including the lungs, is crucial for efficiently extracting oxygen from the air and expelling carbon dioxide.