cell organisation in the human body

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..

Properties of Cancer Cells - 1) Cancer cells show uncontrolled mitotic divisions causing unorganised growth 2) Due to uncontrolled growth and division of cells, a tumour (also called Neoplasm is generally formed) 3) Cancer cells are far less adhesive than the..

or B lymphocytes. T cells are responsible for cellular immunity. B cells provide humoral immunity. Both the types are produced in bone marrow . The process of their production is called Haematopoiesis . Some immature lymphocytes first migrate to the thymus gland, where they m..

. They show a (9+o) arrangement of microtubules. They are involved in the formation of spindle fibres during cell division and the basal bodies of cilia and flagella. Cilia and flagella are found in the surface of motile cells. They show a (9+2) arrangement of microtub..

Animal cell Plant cell Usually smaller in size Usually larger in size Cell wall is absent. Cellulose in any form is absent Cell wall made up of cellulose is present Cytoplasm is denser, more granular and occupies most of the space in ..

A fundamental aspect of an animal's body organisation is its body shape, form and the manner in which body parts are arranged. The word symmetry is used to describe the arrangement of body structures with reference to the body axis. Animal..

The body cavity is a true coelom since it is lined by a layer of coelomic epithelium of mesodermal origin. The coelom is filled with a watery fluid called coelomic fluid which encloses atleast 4 different types of cells (=corpuscles) Phagocytes which can ingest disease producing..

This type of unit cell has eight atoms at corners and one at the body center. Each corner atom makes contribution and the atom at the body center belongs only to the particular unit cell. Hence, a body centered cubic unit cell has,..

. Deficiency of this hormone lowers the permeability of the cells of the distal convoluted tubule and the collecting duct, decreasing the reabsorption of Na + from the filtrate continues in these regions of the nephrons. More filtration combined with less reabsorption of water produces ab..

Calculation of Number of Particles per Unit Cell of a Cubic Crystal System. Keeping the following points in mind we can calculate the number of atoms in a unit cell. An atom at the corner is shared by eight unit cells. Hence an atom at the corner contributes 1/8 ..