How much blood the heart pumps for every square meter of surface area (cardiac index) varies with the age of the individual. For children ages 10Â­13, the average cardiac index is 2.75 liters/m 2 /minute at a resting state. Multiply your body surface area by the cardiac index (2.75 l/m 2 /minute) to determine the liters of blood pumped by your heart in one minute (cardiac output). 2 /minute= ____liters per minute. How does your volume per minute compare to a 2 liter beverage bottle? .
Locomotion in Annelida Before we discuss the details of locomotion in annelids, we have to recapitulate the major subdivisions of the phylum Annelida.Phylum Annelida contains Polychaeta, Oligochaeta and Hirudinea.ocomotor structures. So, Locomotion is the result of co-ordinate effort of all these. Locomotion in Annelida. Before we discuss the details of locomotion in annelids, we have to recapitulate the major subdivisions of the phylum Annelida.
There are marine, freshwater and terrestrial annelids, both free-living and parasitic. There are three classes of annelids: 1  Class Polychaeta: These annelids have conspicuous segments with lateral projections called parapodia, and bear prominent tentacles on the head. 2  Most are marine. 3  Class Oligocheta: These annelids have conspicuous segmentation, but lack a well-defined head.