Скачать с ютуб Ch 6 Class 11 biology | Anatomy of Flowering Plants | पुष्पी पौधों की शारीरिकी | Biology audiobook в хорошем качестве

Ch 6 Class 11 biology | Anatomy of Flowering Plants | पुष्पी पौधों की शारीरिकी | Biology audiobook

#AnatomyofFloweringPlants #Ch6Class11biology #पुष्पीपौधोंकीशारीरिकी #Biologyhindiaudiobook #biologyaudiobook #neet2023 #beatdneet #biomania #biologyaudiobook #neetbiologynotes #neetbiologyaudiobook #neet2022 #biologyaudiobook #biologyhindiaudiobook #biologyhindi Ch 6 Class 11 biology | Anatomy of Flowering Plants | पुष्पी पौधों की शारीरिकी | Biology audiobook You can very easily see the structural similarities and variations in the external morphology of the larger living organism, both plants and animals. Similarly, if we were to study the internal structure, one also finds several similarities as well as differences. This chapter introduces you to the internal structure and functional organisation of higher plants. Study of internal structure of plants is called anatomy. Plants have cells as the basic unit, cells are organised into tissues and in turn the tissues are organised into organs. Different organs in a plant show differences in their internal structure. Within angiosperms, the monocots and dicots are also seen to be anatomically different. Internal structures also show adaptations to diverse environments. 6.1 THE TISSUES A tissue is a group of cells having a common origin and usually performing a common function. A plant is made up of different kinds of tissues. Tissues are classified into two main groups, namely, meristematic and permanent tissues based on whether the cells being formed are capable of dividing or not. Meristematic Tissues Growth in plants is largely restricted to specialised regions of active cell division called meristems (Gk. meristos: divided). Plants have different kinds of meristems. The meristems which occur at the tips of roots and shoots and produce primary tissues are called apical meristems. Anatomically, a plant is made of different kinds of tissues. The plant tissues are broadly classified into meristematic (apical, lateral and intercalary) and permanent (simple and complex). Assimilation of food and its storage, transportation of water, minerals and photosynthates, and mechanical support are the main functions of tissues. There are three types of tissue systems – epidermal, ground and vascular. The epidermal tissue systems are made of epidermal cells, stomata and theepidermal appendages. The ground tissue system forms the main bulk of theplant. It is divided into three zones – cortex, pericycle and pith. The vascular tissue system is formed by the xylem and phloem. On the basis of presence of cambium, location of xylem and phloem, the vascular bundles are of different types. The vascular bundles form the conducting tissue and translocate water, minerals and food material.Monocotyledonous and dicotyledonous plants show marked variation in their internal structures. They differ in type, number and location of vascular bundles. The secondary growth occurs in most of the dicotyledonous roots and stems and it increases the girth (diameter) of the organs by the activity of the vascular cambium and the cork cambium. The wood is actually a secondary xylem. There are different types of wood on the basis of their composition and time of production.