Biology Respiration in Organisms Part 19 (Respiration in Earthworms) Class 7 VII

TL;DR

Earthworms respire through their moist body surface, obtaining oxygen from the water dissolved in the soil.

Transcript

hello friends this video on respiration in organisms part 19 is brought to you by example.com no more fear from exam so now let us selectively choose few organisms and see how exactly respiration happens in them so one such organism which i have chosen is earthworm now i do all know what is an earthworm it is something which is very commonly seen i... Read More

Key Insights

• 🤱 Earthworms are terrestrial invertebrates that improve soil fertility through their feeding and burrowing activities.
• 💦 They obtain oxygen from water in the soil through their moist body surface.
• ❓ Extreme soil conditions, such as excessive wetness or dryness, can affect the survival of earthworms.
• ❓ Earthworms are often found in the top layers of soil, where organic matter is abundant.
• 💱 The moist body surface of earthworms is essential for gaseous exchange and is maintained through the secretion of mucus.
• 🧑‍🌾 Earthworms are commonly known as "farmer's friend" due to their beneficial impact on soil fertility and crop production.
• 💦 Soil moisture is crucial for the survival of earthworms, as it ensures their ability to respire and obtain water.

Questions & Answers

Q: What is the role of earthworms in improving soil fertility?

Earthworms live in soil and consume organic matter, breaking it down and releasing nutrients that enhance the fertility of the soil. Their burrowing also improves soil aeration and drainage.

Q: How do earthworms respire without specialized respiratory organs?

Earthworms obtain oxygen through their moist body surface, which picks up oxygen from water in the soil. Their body surface remains moist due to the presence of mucus and living in moist soil.

Q: Why do earthworms surface during rainy seasons?

Earthworms surface during rainy seasons because excessive waterlogged soil prevents proper gaseous exchange through their body surface. They come out to avoid suffocation and potential death.

Q: What happens to earthworms if the soil becomes too dry?

If the soil becomes too dry, earthworms cannot obtain enough water and oxygen from the soil, leading to dehydration and death.

Summary & Key Takeaways

• Earthworms are reddish-brown invertebrates that live in soil and improve soil fertility.

• They obtain oxygen through their moist body surface, which picks up oxygen from water in the soil.

• Earthworms can surface during extreme conditions when the soil is too wet or too dry.