Earthworm || taxanomy || habitat nad habits || usefulness to mankind || skin || setae digestion || respiration and excretion

Cockroach || taxanomy || habitat and habits || morphology OF head and thorax

Frog || taxanomic positions || habits and habitats || morphology OF frog || digestion in frog

How does the skin of earthworm help in respiration ?

[A] : Earthworm obtain oxygen for respiration through moist skin . They do not have respiratory organs . [R] : They are burrowing in habit .

Earthworms obtain oxygen for respiration through moist skin. They do not have respiratory organs because

Fats are broken down into glycerol and fatty acids with a series of chemical reactions occurring in the digestive tract. The fatty acids are then absorbed through the small intestine and enter lacteals. The excess of such fatty acids gets converted into fats and are stored in the adipose tissue present in the subcutaneous layer. Under starvation, the fatty acids are mobilized to be used as energy during cellular respiration. These fatty acids during cellular respiration are first broken down into

Habits & Habitat|| Body wall/skin || locomotory organ.