The distribution of vascular tissue

• what is the vascular tissue in animals?

  blood
• what does vascular tissue do?

  it transports materials around the body
• what is the vascular tissue in plants?

  xylem and phloem, found adjacent to each other in vascular bundles
• how is the xylem and phloem distributed in roots?

  • the xylem is central and star-shaped with phloem between groups of xylem cells
  • this arrangement resists vertical stresses (pull) and anchors the plant in the soil
• how is the xylem and phloem distributed in stems?

  • vascular bundles are in a ring at the periphery, with xylem towards the centre and phloem towards the outside
  • this gives flexible support and resists bending
• how does the distribution of xylem and phloem in roots affect it?

  this arrangement resists vertical stresses (pull) and anchors the plant in the soil
• how does the distribution of xylem and phloem in stems affect it?

  this gives flexible support and resists bending
• what is xylem?

  tissue in plants conducting water and dissolved minerals upwards
• what is phloem?

  plant tissue containing sieve tube elements and companion cells, translocating sucrose and amino acids from the leaves to the rest of the plant
• what is this an image of?

  a transverse section of a root

  
• what is this an image of?

  a diagram of a transverse section of a root

  
• what is this an image of?

  a transverse section of a stem

  
• what is this an image of?

  a diagram of a transverse section of a stem

  
• where is the vascular tissue located in leaves?

  in the midrib and in a network of veins, giving flexible strength and resistance to tearing
• how does the distribution of the vascular tissue in leaves affect it?

  it gives flexibility, strength and resistance to tearing
• what is this an image of?

  a diagram of section through a leaf

  
• what is this an image of?

  a section through a leaf