human body cell types

Types of Cell Division - Cell division is a method by which new cells are originated from pre-existing cells. The formation of daughter amoebae in amoeba, the development of sex cells and the growth of a young animal or plant into an adult..

Types of Unit Cells - There are three types of non-primitive unit cells. Taking the example of a cubic unit cell we can see that there are three types. They are: fig 2.2 - Types of unit cells..

Summary - 1) The human body has elaborate mechanisms for protection against foreign bodies, germs and cancer cells. 2) Immunity is either innate or acquired. 3) Innate or non-specific immunity refers to a wide variety of body responses against a wid..

Fibrocytes are stellate or star shaped cells, which produce the matrix and white and yellow fibres. Macrophages are irregular, amoeboid cells which can ingest bacteria and other disease producing germs by phagocytosis. Mast cells are spherical or oval cell..

Circulatory System - The transport system in animals is called the circulatory system. The materials are transported from one part of the body to another by a mass flow system which is the circulatory system. The animals, particularly the more advanced forms, have a higher metabolic rate...

The closed circulatory system can be represented as follows. Diagram showing inter-relationship between artery, vein and capillary The closed blood vascular system is a very well developed system This is so because, a) The organisms have a thick body wall to prevent the evaporation of wat..

In human beings, sexual reproduction takes place. Sexes are separate and hence they are known to exhibit sexual dimporphism. Males have sex organs called the tetes while the females have sex organs called the ovaries. Even in the external appearance, males and females show differences. So..

.g., Bugs, fleas, ticks, lice, numerous crustaceans etc. Petromyzon (sea lamprey) is a sanguivorous agnathan, which attachés itself to the larger fish (such as shark) by the sucking action of its buccal funnel, makes a hole in the hosts body with its rasping and toothed tongue mixe..

Generally, in the body of multicellular animals, we can recognize three types of cells: Undifferentiated cells Differentiated cells and Dedifferentiated cells..

. Cells may sometime assume forms, which no longer show cellular characteristics. Cells may die and still remain functional in the body of an organism. Structure and function of a cell is controlled by its genetic material - DNA. Each cell type..