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Contents 1.       Circulatory system…………………………………………….   3 2.       What are chordates?...................................................................   3 3.       General features of circulation……………………………….     3-4 4.       Body fluids……………………………………………………    5 5.       Fluid compartments…………………………………………..     5-6 6.       Blood………………………………………………………....     6 7.       Hearts…………………………...……………………………     7-8 8.       The Flow of Blood inside the Heart………………………….     8-9 9.       References……………………………………………………..   10 Circulatory system ,   system that transports nutrients, respiratory gases, and metabolic products throughout a living organism, permitting   integration   among the various tissues. The process of circulation includes the intake of metabolic materials, the   conveyance   of these materials throughout the organism, and the return of harmful by-products to the   environment . What are chor

CONTENTS 1.       Introduction………………………………………….. 1 2.       Amphibians…………………………………………... 1 3.       Farm pond ecology…………………………………... 2 4.       Habitat requirements for Amphibians……………... 3 5.       Post-breeding habitat use ………………………….... 3 6.       Water Chemistry and Toxicity of Ponds…………… 3 7.       Amphibian Larval …………………………………… 3 8.       Summary……………………………………………… 4 9.       References…………………………………………….. 5 Introduction Constructed farm ponds represent significant breeding, rearing, and over-wintering habitat for amphibians in the Driftless Area Ecoregion of southeastern Minnesota, western Wisconsin, and northeastern Iowa, a landscape where natural wetlands are scarce.Despite intensive agricultural use adjacent to the ponds, these ponds harbor an abundance of frogs and toads The purpose of these farm ponds is to prevent soil erosion and create wildlife habitat, yet no studies have been conducted to determine how the ponds benefit wildlife. Habit