- View more resources from this publisher
Head STEAM
Tooltip
These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.
Jheni Osman: Trees
In this film Jheni Osman describes how the transport systems in plants, the xylem and phloem, may limit the height to which trees can grow. Transpiration is driven by evaporation from the leaves, pulling water up through the xylem. The taller the tree, the further the water has to move against gravity.
To investigate this scientists climbed giant redwoods and found that the leaves at the top of the trees were in drought, and from this they calculated the maximum height that water could be pulled up through xylem.
Show health and safety information
Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.
Information on the permitted use of this resource is covered by the Category Three Content section in STEM Learning’s Terms and conditions.
