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This video walks through the major internal cell types, including the waxy cuticle, upper epidermis, palisade mesophyll... Leaves come in many shapes and sizes.
- 6 min
- 178.5K
- BOGObiology
Key points. The leaf is one of the most important organs of a plant. Leaves produce food for the plant through a process called photosynthesis. The leaves of different plants vary widely in...
This video lesson is designed for 3-6-year-old children. It demonstrates the basic structure of a leaf and its parts. This science lesson provides a practical life experience by introducing the child to the different shapes and colors of leaves.
- The external parts of the leaf are the petiole, leaf base, lamina, leaf apex, and leaf margins.
- The internal parts of the leaf are stomata, guard cells, epidermal cells, mesophyll cells, and vascular bundles (xylem, phloem, veins)
- Stomata are tiny pores present on the surface of the leaves that help in exchanging gases, i.e. absorption of carbon dioxide and release of oxygen.
Let's learn about the parts of a leaf! In this STEM and Beyond video we will learn all about the different parts of a leaf and what each part does.
- 4 min
- 7.3K
- Explore Planet English
- 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.
So plant cells have some common structures. Some of these structures are common with animal cells such as cytoplasm, cell membrane, nucleus, and mitochondria. Plant cells have additional structures including the cell wall and vacuole, and some of them have chloroplasts.
People also ask
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How do leaves produce food for a plant?
Plant cells have additional structures including the cell wall and vacuole, and some have chloroplasts. Each structure in a plant cell has a specific function. Plant cells can be adapted with different shapes and structures.
