Class notes
Invertebrate Respiration
- Course
- Institution
Covers the different respiratory systems in invertebrates in fair detail.
[Show more]
Seller
Follow
chloegalvin
Content preview
Comparative Anatomy and Physiology in AnimalsLecture 5 Respiration in Invertebrates 27/10/20
Composition of air
- Nitrogen: 78.084%
- Oxygen: 20.946%
- Carbon dioxide: 0.04%
Diffusion
- A physical process by which ions or molecules move from a region of greater concentration
to a region of lesser concentration.
Fick’s Law
- R=D*A*(dp/d)
- R= the rate of diffusion.
- D= the diffusion constant.
- A= the area over which diffusion takes place.
- dp= the difference in their partial pressures between the interior of the organism and the
external environment.
- d= the distance across which diffusion takes place.
Respiratory medium
- Air- 21%, thinner at high altitudes, easy to ventilate.
- Water- O2 amount much less than and (0.0015%), O2 lower in warmer water, and harder to
ventilate.
- Air is a better respiratory medium than water.
Structure of the gas exchange surface
- The size of the organism
- Where it lives- water or land
- The metabolic demands of the organism- high, moderate, or low.
Gas exchange surfaces
- Large surface area
- Small diffusion distance
- Moist
- Maintains favourable concentration gradient
- Circulatory system may work at the same time as the gas exchange system to maintain the
concentration gradient
Respiration in Mollusca
- Snails: Hemocyanin in haemolymph, open circulatory system (has copper instead of iron).
Respiration in Gastropods
- Snails and slugs: haemocyanin in most, in family Planorbidae use haemoglobin.
Annelida
- Earthworms: Generally, takes place through the skin. In aquatic forms it goes through gill
filaments. Either haemoglobin or chlorocruorin as respiratory pigment.
Arthropoda
- Arachnids: open system, O2 and CO2 carried by haemocyanin in haemolymph. Trachea and
book lungs
- Crustaceans: gills protected by exoskeleton. They are featherlike and attached to the basal
segments of the legs. Open circulatory system, use haemolymph, with haemocyanin.
- Insects: open circulatory system, haemolymph with probably haemocyanin?
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller chloegalvin. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.82. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67474 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now