Gaseous exchange, Biology

Gaseous Exchange

Gaseous exchange is take place on by both mantle and the gills. The gills of most bivalves are highly changed for filter feeding. They are derived from the primitive ctenidial by lengthening of the filaments on every side of filamentous axis. As the ends of long filaments became folded back towards the central axis; the ctenidial filaments took the shape of a long slender 'W'. The filaments lying beside each other became joined through ciliary junctions or tissue fusions, forming plate like lamellae along with many vertical water tubes inside. Thus water enters the incurrent siphon, propelled by ciliary action, then enters the water tubes by pores between the filaments in the lamellae proceeds dorsally into a common suprabranchial chamber and then out of the ex-current aperture.

Posted Date: 2/4/2013 5:33:23 AM | Location : United States

Related Discussions:- Gaseous exchange, Assignment Help, Ask Question on Gaseous exchange, Get Answer, Expert's Help, Gaseous exchange Discussions

Write discussion on Gaseous exchange
Your posts are moderated
Related Questions
Explain Development of excretory system? The filtration rate of kidney is low and infants find it difficult to eliminate high concentration of solutes. However, by the end of t

Q. What do you understand by Chromosome Behaviour? When we study meiosis. we not only observe the regularity of pairing which is important' for' the fertility of the plants, we

Alterations occuring in cereal & cereal products, legumes You are already aware of the chemical composition of cereals and pulses.  We will now look into changes occurring in t

Which of the following is true for the ATP-sensitive potassium channel? A. The channel is a spanning protein with a receptor site for ATP located on an extracellular region of

Collect images of heterotrophs and make a Powerpoint Presentation on them

If two organisms share the similar kingdom, must they also share the similar domain? Explain. Two organisms that share the similar kingdom must also share the similar domain b

New advancements and discoveries related to oogenesis

Driving Force - Mineral Nutrition Let us now find out what is the driving force involved in protein mediated transport. Many membrane transport proteins allow specific solute

Within the cytosol which series of enzymes in order convert citrate back into pyruvate: -citrate lyase, malate dehydrogenase, malic enzyme - citrate synthase malate dehydroge