Circulatory system and chambers in heart of fish
Explain, whether fishes have an open or closed circulatory system? How many chambers are there in heart of the fish and how does blood flow throughout fish body?
Expert
In every vertebrate, including fish the circulatory system is closed, that is, blood flows within the blood vessels.
Fish heart has two consecutive chambers:
a) Thin-walled atrium and
b) Muscular ventricle.
The arterial or the oxygenated blood comes from the gills and gains arteries towards the tissues, and then the venous blood is collected by the veins and reaches atrium of heart passing to ventricle which pumps venous blood in the direction of the gills to become again oxygenated.
How fecundations are different in osteichthyes and in chondrichthyes?
What is an illustration of freshwater flat-worm? Due to that habitat illustrate the physiological problem that such animals must resolve?
Give a brief explanation of the term nekton, plankton, and benthos.
State some of the respective constituents of gray matter and of white matter of the spinal cord?
Does DNA duplication take place in the cell division?
How does study of fossils strengthen theory of evolution?
Give a brief description of compound eyes?
Write down the major factors which affect the growth of population.
Explain four initial stages of the embryonic development?
Define the term population Trap? Briefly illustrate it?
18,76,764
1960405 Asked
3,689
Active Tutors
1458420
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!