collenchyma • Complex permanent tissues – vascular system. › Vascular system – transport materials like water‚ minerals‚ sugar etc › Xylem – conducts water and minerals from roots of leaves 2 conducting cells: vessel elements & tracheids. › Phloem – transport glucose to leaves of the roots (Sieve tube cells) *Epidermis – outermost cell layer that covers the leaves‚ stems etc BASIC PLANT BODY • Plant is divided into shoots and roots. Shoots – structures above ground (arises from plumule)
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Anatomy of Flowering Plants Tissues A tissue is a group of cells having a common origin and usually performing a common function. Based on cell’s capability to divide‚ tissues are classified into two main groups which are as follows: 1. Meristematic and 2. Permanent tissues. Meristematic Tissues: Cells in the meristematic tissue are capable of dividing. Meristematic tissues are found in those regions which need to grow continuously. For example‚ root tips and stem tips contain meristematic
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form root to plant. Phloem carries soluble organic material i.e. food for the plant. The top of the plant is in the light‚ conducting photosynthesis and helping the plant reproduce. There are two types of vascular tissues‚ together they for vascular bundles and are responsible for the survival of the plant. Xylem flows only from bottom up to the top and Phloem flows both ways. Phloem is the innermost layer of the bark in most trees. Outer Phloem is dead cells and inner Phloem is living cells‚ when
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while food passes downwards and upwards in the sieve tubes of the phloem. There are four main differences between xylem and phloem: (1) xylem is dead‚ where as phloem cells are alive. (2) Xylem carries mainly water and minerals‚ while organic compounds such as sugar and amino acids are transported to the phloem. (3) The flow of liquid in xylem is upward only‚ whereas the flow of liquid in phloem is bidirectional. (4) The contents in phloem can move up and down the plant simultaneously. Observations
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DATE: 2011/09/27 LAB NO.: 4 SYLLABUS TOPIC: Cellular structure AIM: To draw a tissue map of a dicotyledonous root. APPARATUS AND MATERIALS: Microscope‚ slides of the dicotyledonous root‚ and drawing materials such as pencils‚ ruler‚ and an eraser. METHOD/PROCEDURE: -The microscope was set on the tabletop (a flat‚ sturdy surface) where there was plenty of room to work with and was plugged into a power source. -The slide of the specimen (dicotyledonous root) was placed onto the stage of the
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are organized into a ring 3. Dicot stem xylem form a ring around the outside whereas monocot xylems are scattered 9.1.3 Distribution of tissues in leaves and functions In the leaf you have xylem and phloem tissues. Xylem tissues act like transport tubes‚ transporting water and minerals. Phloem tissues are used to transport sugars and water (sap). When each of these tissues are connected with each other throughout the plant‚ they form a circulatory system. 9.1.4 modification of roots * Roots
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Chapter 35 Plant Structure‚ Growth‚ and Development Lecture Outline Overview: Plastic Plants? • The fanwort‚ an aquatic weed‚ demonstrates the great developmental plasticity that is characteristic of plants. o The fanwort has feathery underwater leaves and large‚ flat‚ floating surface leaves. o Both leaf types have genetically identical cells‚ but the dissimilar environments in which they develop cause different genes involved in leaf formation to be turned on or off.
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water ➞ glucose + oxygen chlorophyll 6CO2 + 6H2O ➞ C6H12O6 + 6O2 LEAF STRUCTURE: broad flat part - the lamina petiole/stem - joins the lamina to the plant xylem - running through the petiole - transport water and mineral ions from the roots phloem - transporting sugars and other small organic molecules to different parts of the plant. epidermis - function is to protect the inner layers of cells - is a close fitting layer on both the top and bottom of the leaf. epidermal cells sometimes secrete
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6. Anatomy of Flowering Plants Tissue It is a group of cells that are similar in structure and are organised together to perform a specific function. It is of two types: Meristematic tissues and Permanent tissues Meristematic tissue It consists of actively dividing cells that are found in those regions of the plant body that show growth. The examples include root tip‚ shoot tip‚ and base of the leaves. It is classified into three types: i. Apical meristem: They are present in
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xylem tissue and phloem tissue with a cambium as in dicot stems or without cambium as in Monocot stems or of one kind of tissue xylem or phloem as in roots. Vascular bundle may be regularly arranged in a ring as in the stems of most dicotyledons and in all roots or they may be scattered in the ground tissue as in stems of Monocotyledons. Elements of Vascular Bundle Vascular bundle of Dicot stem when fully formed consists of there well defined tissues (1) Xylem or wood (2) Phloem or bast (3) Cambium
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