How are alveoli desinged to maximum the exchange of gases answer in 200 words
Answers
Answer:
alveoli are functional unit of lungs . they are the sac like structure that helps in exchange of gases. internally alveoli are lined with simple epithelial tissue or pavement epithelial tissue arranged like tiles. from this joining among several tiles like structure both o2 and co2 diffuse from higher to lower concentration of eachother ( concentration of o2 is less in the body so it diffuses inside pavement epithelium and concentration of co2 is more at inner body so they diffuse toward lungs)and exange of gases takes place.. the diffused oxygen reaches body parts by the combination with haemoglobin in form of oxyhaemoglobin ( hb2o) but at maximum levek 1 haemoglinin can combine with 4 oxygen atom. i.e( hb(4)o2)which decompose inside body into oxygen molecule that is utilized in our body by tissue and blood returns to lung by carrying oxygen produced in our body. hence this process continuous several times
Answer:
The human respiratory tract is made up of nostril, larynx, nasal chamber, pharynx, trachea, epiglottis, alveoli, bronchioles, bronchi and lungs. Within the lungs, the oxygen is exchanged for carbon dioxide waste through millions of microscopic sacs known as alveoli. The oxygen inhaled diffuses into the capillaries of the lungs, binds to the haemoglobin and is pumped into the bloodstream. The carbon dioxide from the blood diffuses through the alveoli and is expelled by exhalation.
The alveoli are thin-walled and richly supplied with a network of blood vessels to facilitate the exchange of gases between blood and the air-filled in alveoli. They have a balloon-like structure that provides maximum surface area for exchange of gases.