The platypus occupies a wide range of freshwater habitats, including ponds, lakes, rivers, and streams at all elevations. The animals are not adapted to feed on dry land, and so are most commonly found in permanent water bodies. The species will also use humanmade reservoirs as long as the water is not too deep, mainly feeding at a depth of less than 16.5 ft (5 m). The platypus is known to occur in both urban and agricultural areas. The animals are also occasionally seen in river estuaries, though there is no evidence that they occupy saltwater habitats on a permanent basis.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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