Stages of animal growth

Stages of animal growth


  • 1 stages of animal growth
  • 2 methods of reproduction
  • 3 Examples of important stages of growth 3.1 stages of the growth of frogs 3.2 stages of chicken growth 3.3 Stages cats growth
  • 3.1 stages of the growth of frogs
  • 3.2 stages of chicken growth
  • 3.3 Stages cats growth
  • 4 References

Stages of animal growth

Animals are a variety of living organisms are different types, shapes and sizes, and vary in function, installation, and ways of living, and varies physical composition and places of livelihood, the mismatch predator, including the pet, including what feeds on meat and herbs at the same time (called Algart), including those classified as animals wild or marine animals, including warm-blooded or cold-blooded animals, which are classified by way of reproduction by birth or lay eggs, which are classified in a way fitting the body Kalfaqariat and invertebrates. In general, animals stages of growth and different evolution and uneven pass since the formation of the cells of her parents (or cells cloned some objects), and even its transformation into adult animals mature and able to reproduce, and is considered the growth process is the means that are made by organisms living generations new to replace them in nature, and without any object that can disappear completely from nature. [1]

Methods of reproduction

Breed animals in two basic ways, namely sexual reproduction and reproduction is sexual. Contributes to sexual reproduction Heoanan different produces one egg and Aqahha the other, and can be male and female, or be both bisexual, and the reproduction is sexual Visttia in which one animal produce new objects. [2] is not considered reproduction is sexual often popular phenomenon in the Kingdom the animal, but it exists in some species of invertebrates, and the most important of jellyfish and echinoderms (such as stars and sea urchins) and coral, and in the case of these objects, the reproduction by formation of small buds (English: buds) on the body of the original object, and then grow until it reaches the stage puberty, Vtnfsal mother object to turn into a new animal. [3]

Fragmentation also (English: Fragmentation) is one of the methods of reproduction is sexual, where eroding the original animal into several parts may be up to eight or nine parts, and grow each and every one of them to turn into a complete animal growth, and can some types of worms reproduce in this way. Finally, you can female some animals lay eggs and leave it to grow and produce young immediately, without any need for pollination by animal male, called this type of reproduction "Birth of the Virgin" (English: Parthenogenesis), which is prevalent among some species of fish, frogs, lizards, and insects. [3]

Examples of important stages of growth

Stages of the growth of frogs

Frogs are classified as animals Amphibious, ie they live on land and water at the same time, and breed frogs at certain times of the year, it differs from one type to another depending on the geographical area where the animal lives. When it's mating season is heading frogs viscerally to a river or a nearby lake to look for a partner, and in many cases may choose the frog back to the same place where he was born to see a partner. [4] After mating, the male Ba_khasab eggs and is inside the water, and then most species of frogs abandoned eggs and taken away without attention to monitor or protect him, although some of them may try to stay to look after it. [5] after a few weeks - vary depending on the frog species - the eggs hatch and out of the tadpole, or what is also known as "Dad Znabh "It is a small object oblate shape, has a long tail but colorless legs. After hatching, heading Abu Znabh, looking for aquatic herbs floating related to using his mouth, and begins Baltgve on different types of algae, and can breathe through the nostrils. [6]

Almost a month after hatching tadpole change begins, where it grows skin above Khiahimh to covered and lose their ability to work, and start Lungs Baltkon, and which Tmcnanh later to live and breathe on the surface of the land, and the installation of his digestive system changes in preparation for the change in diet; As the adult frog eats insects, spiders, snails, small fish, and other creatures of different invertebrates rather than algae or aquatic plants that were eaten at the tadpole stage. After six to nine weeks of hatching almost four small legs appear to start around the tadpole, and take his eyes Baltbaeid from each other, which increases the extent of his vision, and acquires the ability to hear sounds, and increasing the head space that is taking shape more mature and expand his body significantly . At this point, it looks like a frog looks very very long tail, and turns in almost an extra month to the adult frog, an animal which is fully developed ready for breeding. [7]

Stages chicken growth

Chicken is a type of bird species that feeds it man, one of the most important animals that are raised in homes or farms to use their meat and eggs, and breed chickens by mating direct inoculation eggs, as doing so cock (a male chicken) after the female end of the situation eggs. After the cell division process begins with the embryo Baltkon, and continues to grow for a period ranging from 20 to 21 days incubating female eggs during which before they hatch from Whitth, and then accompanied his mother to learn to eat hay and grain to give speed to grow the necessary strength, and grow chickens gradually thieves to take the feathers to grow when the age of five months, and mature hen sexually when she turns eight months stage, so that it is ready to develop and take care of young children in turn. Chicken embryos are considered one of the first animals that scientists have studied how evolution and growth stages, due to the ease of access to and nurtured in the laboratory, and then follow-up provided by creating a small incision in the wall of the egg. [8]

Stages cats growth

Cats vertebrates pets in the backyard, and feed cats on meat, dairy, and some processed foods and canned, and multiply by birth direct mating between male and female, after a gestation period of nine weeks, the female lays a number of Herr ranges between three to five , the number rarely has up to ten, and nearly one of them weighing about 100 grams. Small blind be Herr and deaf, and therefore have to rely entirely on the care of her mother. The increasing weight after a week of birth significantly, beginning after the second week to open their eyes and hear around sounds and show the first of her teeth, but they can not move and vision so well reached the age of three weeks, as it becomes a sound stance and can walk uprightly, and after arriving at the age of six weeks weaned by the mother (stop drinking milk), and at that time, it completed its brain and nervous growth apparatus, and become able to rely on itself to some extent. Cats become sexually mature and ready to breed when they reach about 5 to 9 months of age (females), or 7 to 10 months (males), usually live up to fifteen years. [9]


  • ↑ Boris Ivan Balinsky, "Animal Development"، Birtannica, Retrieved 28-06-2016.
  • ↑ "Animal Development", Augusta University, Retrieved 28-06-2016.
  • ^ أ ب John Kimball, "Asexual Reproduction"، Kimball's Biology Pages, Retrieved 28-06-2016.
  • ↑ Stebbins, Robert C.; Cohen, Nathan W. (1995). A Natural History of Amphibians. Princeton University Press. pp. 154–162. ISBN 0-691-03281-5.
  • ↑ "Life Cycle of a Frog"، All about Frogs، Retrieved 08-05-2016.
  • ↑ Steve Janover، "Metamorphosis - The Life Cycle of a Frog"، Web-based Inquiry - Frogs and Toads، Retrieved 08-05-2016.
  • ↑ Stebbins, Robert C.; Cohen, Nathan W. (1995). A Natural History of Amphibians. Princeton University Press. pp. 179–194.
  • ↑ "Chicken Development", Embryology, briefed him on 28.06.2016.
  • ↑ panel of authors (1999), Encyclopedia of Arab World (Second Edition), Riyadh, Saudi Arabia: Foundation work Encyclopedia Publishing and Distribution, page 221-222, 18 part (s).


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