Question

3. Compare the functioning of alveoli in the lungs and nephrons in the kidneys with
respect to their structure and functioning.

Answer 1

The alveoli are the tiny air-filled sacs that are present as the primary units in the lungs of every person, while nephrons are the units of kidneys that have long and slender tube-like structures.

The walls of the alveoli are made of a single layer of cells, with blood capillaries passing through these walls. On the other hand, each nephron is made of Bowman’s capsule, long renal tube and glomerulus.


The exchange of oxygen and carbon dioxide occurs in the blood capillaries of the alveoli; while the filtration of the blood occurs within the nephrons.

Answer 2

ALVEOLI IN LUNGS :-

1. Alveoli are balloon like structures.

2. It is made up of one celled thick wall which contains extensive network of blood capillaries.

3. Alveoli are the site of gaseous exchange in lungs. Exchange of oxygen and carbon dioxide takes place between the blood flowing in capillaries which surround the alveoli and gases present in the alveoli.

NEPHRONS IN KIDNEY:-

1. Nephron are long tubular structures.

2. It is made up of glomerulus , Bowman's capsule and a long renal tube.

3. Nephron are the basic filteration unit of kidney. Each nephron filters the blood and separates the nitorgenous waste in the form of urine.