Respiratory system in fishes, Biology

The fishes belong to class Pisces under vertebrates.
2. In fishes, the respiratory system consists of mouth, pharynx, internal branchial apertures, branchial pouches and external branchial apertures.
3. The branchial (gill) pouches are covered by mucous membrane which is thrown into folds called branchial (gill) lamellae.
4. Fish keep its mouth open and lower the floor of the oral cavity. Then the water (with dissolved oxygen) enters oral cavity.
5. While the mouth is closed, the floor of oral cavity is raised and the water from oral cavity flows into pharynx then into internal branchial apertures.
6. The gill lamellae are now bathed with water and gaseous exchange takes place.
7. Oxygen diffuses from water into the blood and 2 CO diffuses out from the blood into the water.
8. Then the water flows out through external branchial apertures.
9. The continuous opening and closing of mouth by a fish in water is to draw water into the oral cavity.

255_Respiratory system in fishes.png

Posted Date: 8/29/2012 8:49:36 AM | Location : United States







Related Discussions:- Respiratory system in fishes, Assignment Help, Ask Question on Respiratory system in fishes, Get Answer, Expert's Help, Respiratory system in fishes Discussions

Write discussion on Respiratory system in fishes
Your posts are moderated
Related Questions
The Basque people, who lived in the Pyrenees Mountains between France and Spain, have one of the highest frequencies of the d allele in the Rh system so far reported. In one study

Post-parturient haemoglobinuria (pph) in cattle and buffaloes The post-parturient haemoglobinuria (PPH) is an acute disease of high yielding buffaloes and cows. The disease oc

Define the Calcium Toxicity? Elevated blood calcium can occur in association with high parathyroid hormone, hyper- or hypothyroid conditions, bone metastasis, vitamin D toxicit

Hello, I''m doing an assignment on characteristics and types of fungal enzymes and have also been requested to describe their assay.My libra

Therophytes - Classes of Life Form These are annual plants of the summer season or of the favourable season. They complete their life cycles in a single favourable season and

Explain Le Compte Operation-REV Procedure ? This is an alternative type of repair for TGA, VSD and left ventricular outflow obstruction (LVOTQ). In this operation an extrinsic

EYE HISTOR Y - Steva n described it first. Study of eye is ophthalmology. Instrument used to examine interior of eye is  ophthalmoscop e . SHAP E - More o

Define Physical Capacity Tests for Aerobic capacity? Aerobic capacity has already been defined. Aerobic capacity is usually measured using a tread mill test in which the intens

Please help with the following: 32P is an unstable isotope of phosphorus that has a half-life of 14.29 days. Atoms of this isotope undergo beta decay in which a neutron decays i

Organisms are made to compete for their needs from the environment. The competition as we pointed earlier could be for the food and territory, to overcome the adverse climatic cond