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The waxy cuticle surface on the outside protects the leaf and prevents excess water loss. The palisade cells at the upper side are packed with chloroplasts to maximise photosynthesis.
The upper part of the leaf is where the light falls, and it contains many cells called palisade cells. This has many chloroplasts, with lots of chlorophyll to trap as much light as possible.
- Leaf Structure
- Chloroplasts and Photosynthesis
- Stomata and Gas Exchange
- How Is The Opening and Closing of Stomata Regulated?
Leaves are complex organs made of several layers of tissue. These are the epidermis, the palisade mesophyll layer, the spongy mesophyll layer, and vascular bundles. 1. Theepidermis is the “skin” of a leaf. Sometimes there is also a cuticle outside the epidermis. This is a waxy layer that helps prevent water loss. This is especially important in dry...
Chloroplasts are specialized organellesthat are only found in plant cells. Chloroplasts contain thylakoids. Thylakoids are the specific structures responsible for photosynthesis. Some thylakoids float freely in the fluid that fills the chloroplast. This fluid is called stroma. But most thylakoids are in stacks called grana. A single grana is called...
The stomata in a leaf’s surface are surrounded by specialized cells called guard cells. Guard cells regulate the opening and closing of stomata. They open by taking in water. This causes them to swell and take on a crescent shape. They close by releasing water. This causes them to shrink and take on a long, thin shape. Stomata allow oxygen (O2) and...
Each guard cell contains a large vacuole, a nucleus and chloroplasts. Generally, when the plant senses good conditions, like bright light or high humidity, its stomata open. This happens when guard cells swell with water through the process of osmosis. The reverse happens when stomata close in poor conditions.
This interactive leaf diagram is perfect for teaching leaf structure. Each of the different parts of a leaf is labelled. Covers Upper Epidermal Tissue and more.
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Aug 24, 2018 · A leaf cell, by definition, is any cell found within a leaf. However, there are many different kinds of leaf cell, and each plays an integral role in the overall function of the leaf and the plant itself. A single leaf cell may be designed to simply photosynthesize, or create sugars from the energy in light.
Viewing leaf structure under the microscope shows different types of cells that serve various functions. It's possible to view and identify these cells and how they are arranged.
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Jan 28, 2019 · Leaf structure Yr 7. Structure of a leaf powerpoint. It starts with recall of plant cells, then covers each cell found in the leaf. Students are then given a worksheet with the leaf structure drawn and have to label it based on what they have learnt, this is a challenging lesson.
