internal structure of plants

Variations in leaf structure to reduce transpiratio..

A longitudinal section of the kidney shows three distinct regions: Renal Cortex Renal Medulla Renal Pelvis A longitudinal section of the kidney showing three distinct regi..

The human heart is a muscular, cone-shaped, hollow organ about the size of a fist (about 12cm in length and 9cm in breadth). The heart is situated behind the sternum, between the lungs in the thoracic cavity. The heart is tilted slightly such that its apex is towards the left side. The major p..

There appear to be many structures that are similar because of the function they carry out and in their external appearance. However, these structures differ internally. Such structures are called analogous structures. For example, wings of bat and..

: Include different types of soils, their fertility and vast biological wealth in them. Forest resource: Include all types of forests and other naturally grown plant sources. Crop resources: include all cultivated crops and their potentialities. Marine and aquatic resources: Include ..

Structure of the Earth - In outward appearance, the earth is a nearly spherical ball with a radius of 6350 kilometers. Internally, the earth consists of three major layers. They are: Crust Mantle Co..

Variations in leaf structure to reduce transpiration: Xerophytic plants have small leaves thick cuticle sunken stomata covering of epidermal hairs well developed palisade parenchyma to reduce transpiration increased wax deposits on leaves conifers like pines have leaves reduced ..

Structure of Cell - Cells vary in shape and size. They may be oval, spherical, rectangular, polygonal, spindle shaped, star shaped, rod-shaped or totally irregular like the nerve cell. The diversity in cells is in accordance with the role or function it has to perform as part of the tissu..

Structurally all types of chlorophyll resemble one another. All of them contain four pyrrole rings [also called porphyrin] which are linked together by methane bridges (-CH=). The skeleton of each pyrrole ring is made up of five atoms - four carbon and one nitrogen with magnesium in the c..

Respiratory system - It consists of a pair of lungs, a pair of bronchi and a trachea. The lungs contain numerous microscopic functional units called alveoli. These structures are involved in pulmonary respiration. In addition, there is buccal respiration, through the buccal cavity and cut..