Question

CIRCULATORY SYSTEM

1.Describe how animals transport materials from the environment to the cell

2.Explain the different circulatory systems or methods of material transport in the following phyla: Cnidaria, Platyhelminthes, Mollusca, Annelida and Arthropoda

3.Describe evolution of circulatory systems in vertebrates from fish to mammals. Explain the variation in heart structure and circulation.

4.What is the difference between a closed system and an open system? Which one has more advantages for an active predatory lifestyle and why?

5.What is the importance of diffusion in the transport of materials? What is the composition of vertebrate blood?

6.What are the two phases of the cardiac cycle? How is this cycle evaluated? Identify the different aspects of the cardiac cycle on an ECG.

Answer 1

Question no 1

Animal transport material to cell with the help of the circulatory system of their body . It mainly comprises of a pumping organ mainly known as heart and has the accompanying structure like blood vessel . Thy are the ones that transport the required material to the site if cell that is in need of the substance. Cell respiration is the main process and it will take place with the help of these material that are supplied by the circulatory system to the cells .