Growth In Animals

Growth in animals is divided into two phases, namely:
1. Embryonic
Is the growth phase zygote to embryo formation. This phase includes several stages.a.Phase cleavage (cleavage) and Blastulasi-Cleavage zygote divides (mitosis) into many blastomeres. Blastomeres together to form like strawberries called MorulaMorula has two poles, namely:* Polar animals (animal pole)* Pole plant (vegetal pole)-Blastulasi morula cells divide and "strawberry" morula form a cavity (blastocoel) filled with water, called a blastula.b.

GastrulationIt is the process of changing blastula into gastrula.In this phase:-blastocoel deflated or even disappear-Þ blastopole hole formed develops into the anus-formed space, ie gastrocoel (Archenteron) Þ develops into the digestive tract-formed three embryonic layers: ectoderm, mesoderm and endoderm
Based on the number of embryonic layers, animals are grouped into:-Animals diploblastik: embryonal have 2 layers, the ectoderm and endoderm-Animals triploblastik: have a third layer of embryonic* Triploblastik aselomata: do not have a body cavity* Triploblastik pseudoselomata: having a false body cavity* Triploblastik selomata: have a body cavity that is true, the result of folding mesoderm

 c.MorphogenesisThe process of growth, development and differentiation into organs, organ systems and organisms.d.Differentiation and Specialization NetworkÞ tissue differentiation / embryonic layer will develop into various organs and organ systems.Specialization Þ each network will have the shape, structure and function of each.e.The impact of embryonicDifferentiation of an embryonic layer affects and is affected by the differentiation of other embryonic layers.


2. Post-embryonic phase
Generally include metamorphosis, and regeneration.
Metamorphosis is the transformation of the rise of youth Þ adult animals.a. InsectImperfect Metamorphosis: Egg Þ Þ nymph imago.Complete metamorphosis: egg larvae Þ Þ Þ pupa imago.b. FrogZygotes tadpoles Þ Þ Þ young frog adult frogs.
Regeneration is the ability to repair cells, tissues or body parts are damaged, missing or dead.
- Higher animals Þ ​​limited to the network- Þ lower animals to arrive at the organ level