Do fishes have a closed or open circulatory system
Do fishes have a closed or open circulatory system? Describe the number of chambers does a fish heart contain? How does blood flow all through the fish body?
Expert
Since in every vertebrate, the circulatory system of fishes is closed, that is, blood flows merely in blood vessels. The fish heart has just two consecutive chambers: a thin-walled atrium and muscular ventricle. The arterial (or oxygenated) blood comes from gills and gains arteries in the direction of tissues, then venous blood is collected by the veins and reaches atrium of the heart passing to the ventricle which pumps the venous blood in the direction of gills to be again oxygenated
Give some illustrations of human cells which generate proteins for exportation? Which cytoplasmic organelle is predicted to be well-developed and plentiful in such cells?
Setting up a new business and making it click particularly in anew field of activity is a challenging job. Setting up a unit for supplying of packed lunch boxes is one such business. Success in the same depends on the ability to sell the concept in an
Explain why there are some plants which are having single-seeded fruits and some fruits having more than one seed?
Explain the chief cellular attributes of beings of the plant kingdom?
What do you mean by tetany?
Give a brief description of peripheral nervous system (PNS)?
What are the main endocrine functions of the placenta?
What do you mean by the term Hearing AID?
Describe how does cellular immune response take place?
Besides liver that is other adnexal gland of the digestive system which releases substances within the duodenum participating in the extracellular digestion?
18,76,764
1933373 Asked
3,689
Active Tutors
1424742
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!