Give reason why lung alveoli are covered with blood vessels
Give reason why lung alveoli are covered with blood vessels
As per the structure of the lungs, the windpipe (trachea) branches into two bronchi (one to each lung). The bronchi split into smaller and smaller tubes called bronchioles. The bronchioles end in microscopic air sacs called alveoli..
Alveoli present in the lungs are lined with mucus and covered with blood capillaries so that the exchange of gases can take place between the membranes of the alveoli and the surrounding capillaries.
The blood capillaries covering alveoli have low concentrations of oxygen and high concentration of carbon dioxide.
The mucus lining of the alveoli allows oxygen to dissolve in it.
They have a very thin lining to allow oxygen to diffuse into the blood easily, and surrounding blood capillaries pick up and transport oxygen.
There is an exchange of gases between the alveoli and their surrounding capillary blood vessels. Oxygen diffuses from the air sac into the blood. Carbon dioxide diffuses from the blood into the air sac.
The capillary network allows efficient gas exchange in tissues since they have a large surface area and they have thin walls
As per the structure of the lungs, the windpipe (trachea) branches into two bronchi (one to each lung). The bronchi split into smaller and smaller tubes called bronchioles. The bronchioles end in microscopic air sacs called alveoli..
Alveoli present in the lungs are lined with mucus and covered with blood capillaries so that the exchange of gases can take place between the membranes of the alveoli and the surrounding capillaries.
The blood capillaries covering alveoli have low concentrations of oxygen and high concentration of carbon dioxide.
The mucus lining of the alveoli allows oxygen to dissolve in it.
They have a very thin lining to allow oxygen to diffuse into the blood easily, and surrounding blood capillaries pick up and transport oxygen.
There is an exchange of gases between the alveoli and their surrounding capillary blood vessels. Oxygen diffuses from the air sac into the blood. Carbon dioxide diffuses from the blood into the air sac.
The capillary network allows efficient gas exchange in tissues since they have a large surface area and they have thin walls
