All living things must cat, and breathe, in order to live. It is by asking these questions: How does it cat? anil how does it breathe? that we are able to tell the difference between plants and animals. The biggest difference is that plants can make their own food out of air and water, aided by sunlight. Animals cannot. Therefore animals must get their food by eating plants, or by eating other animals that get their food by eating plants. Plants...more
There are many different kinds of animals on the earth, and often they are re-ated to other types that are very much like them in some ways, but different in others. For instance, among dogs, there arc boxers, poodles, Airedales, collies, German shepherds, hounds, setters, pointers, and many others. They arc of different sizes, and look different in many ways, but they are all dogs, and belong to the same "family." The sameis true of cats,...more
All living things, whether plants or animals, are made up of tiny particles called cells. There is a separate article about the cell in this encyclopedia. Here we will pause only to explain that the cells that form animals are usually very small-it would take several thousand of them to measure an inch, so that they cannot be seen without a microscope- and that many millions or billions of them may be needed to make the body of a single animal. The simplest of all animals may have only a single cell. Such animals are called protozoans. Most of them live in water, and some have shells, even though they are so small themselves. Many are parasites, which means they cannot live by themselves, but must live in the bodies of other animals, or in plants. The article on ameba, in another volume of this encyclopedia, tells how one of these one-celled animals lives. Some protozoans, small as they are, are very important as food for other animals; they are found in "plankton," which is a mass of tiny plants and animals drifting in the sea. Plankton is the chief food of the gigantic whale, and human beings could eat plankton without harm. Most animals, unlike the protozoans, are formed not...more
Though they are different in so many millions of ways, there are some ways in which nearly all animals are the same. They all need oxygen to live. Both air and water contain oxygen Land animals breathe it in from the air. Sea and freshwater animals, such as the fish, breathe it in from the water. Some animals are called amphibians, which means...more
There is no part of the earth on which there is not some animal life. Some animals live at the north and south poles, where it is always frozen; some at the equator, where it is always hot. Some live in the depths of the ocean, and some on the peaks of the highest mountains. The surroundings in which an animal lives are called its environment....more
Children today learn about birds by watching them in their natural homes, in the trees, or on the ground. They see how the birds build their nests, lay their eggs, and then feed the hungry little birds after they are hatched. Most of these birds arc songbirds and perch ers, and there are so many types that even to list them would require a whole book. Most of these familiar birds belong to such species as the thrushes, larks, swallows, woodpeckers, sparrows, warblers, wrens, swifts, owls, jays, crows, and ravens. We can say of birds that they are all covered with feathers, and that they all lay eggs, but we cannot say that they all fly. In fact, the biggest bird of all, the African ostrich, cannot fly at all, but runs very fast on its two powerful legs. The rhea, of South America, and the cassowary, of Australia, are both wingless birds related to the ostrich. Another type is the emu, also of Australia. Then there are the penguins, diving and swimming birds of the Antarctic. They have wings, not to fly with but to use as paddles in the water. When they walk about on land, they look like little people dressed in frock coats, and are very comical. Many species of birds migrate, which...more
Dogs can be loving and caring pets, they are often referred to as 'mans best friend'. But dogs can also be vicious and dangerous. On many occasions they have been known to attack people completely unprovoked and without warning. The NHS...more
Squeaker Dog ToysSqueaker dog toys are just the best way to have a great time with your dog. You will laugh a lot seeing him play with it and it will surely remind you the way you used to play with such toys when you were...more
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Acupressure for Your Animals By Amy Snow & Nancy Zidonis Now that modern medicine is finally catching up with the ancient healing sciences it is time to share the wealth of all these health benefits with our animals. Acupressure is one...more