Acoelomatа
Acoelomatа

The definition of what Acoelomata In acoelomata is animal, the absence of the whole, or of an official body cavity. True body cavities form only in multicellular organisms with true tissues. In this group eumetazoa, there are organisms such as corals and jellyfish, which have only 2 main fabrics. In the compartment...

Abïogenez
Abïogenez

The definition of what Abiogenesis Abiogenesis is the creation of organic molecules by forces that are different from living organisms. While organisms can create carbon-carbon bonds is relatively easy thanks to the enzyme to make it otherwise requires a lot of energy. In the beginning...

allantois
allantois

The definition of what the Allantois the Allantois is one of the four major membranes surrounding the embryo. It is found near the rear of the embryo as it begins its development. The allantois characteristic of reptiles, birds and mammals, and lies between two other nazaralieva tissues...

Apoptosis
Apoptosis

The definition of Apoptosis Apoptosis is a process that occurs in multicellular organisms when the cell is deliberately “decide” to die. This often happens for the greater good of the whole organism, for example, when the DNA of cells become damaged and it may become cancerous. Apoptosis is called “programmed” cell death, because...

atavism
atavism

Definition of Atavism an Atavism is a phenomenon in which the phenotypic trait appears in the organism after a period of absence. Atavism refers to a trait that is not present in the immediate predecessors of man, though existed in its ancestors. This is possible due to the way genes behave throughout...

Abdomen
Abdomen

The definition of the Abdominal Cavity In the abdominal cavity is a large cavity found in the mammalian body between the thoracic cavity separated from thoracic by the diaphragm and pelvic cavity. A protective layer called the peritoneum, which plays a role in the immune system, supporting structures and storage of fat,...

Abdomen, Abdominal cavity
Abdomen, Abdominal cavity

The definition of what Abdomen the abdomen refers to the area between the pelvis (pelvic region) and chest (thoracic diaphragm) in vertebrates, including humans. The space located in the abdomen, called the abdominal cavity. The boundaries of the abdominal cavity consists of the back the ventral surface of the anterior abdominal wall, lower...

animal cells
animal cells

The definition of Animal Cells animal Cells are the basic unit of life in organisms of the Kingdom Animalia. It is eukaryotic cells, which means that they have a true nucleus and specialized structures called organelles, which perform different functions. Plants, fungi and simplicity have eukaryotic cells,...

alimentary tract
alimentary tract

The definition of what the digestive tract the alimentary canal is a continuous passage from the mouth and ending at the anus, which carries food through different parts of the digestive system and makes it easy to get out of the body. The alimentary canal varies greatly in the body, but only saw...

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