Hair
The structure of an onion epidermal cell consists of a cell wall, cell membrane, cytoplasm, and a large central vacuole. The function of an onion epidermal cell is to provide protection for the plant, regulate water and nutrient uptake, and help with gas exchange through stomata.
To examine leaf epidermal cells, a leaf sample is typically cleared with a clearing solution to make the cells transparent. The cleared leaf sample is then mounted on a slide with a drop of water and covered with a coverslip. Finally, the sample is observed under a microscope to study the size, shape, and structure of the leaf epidermal cells.
Epidermal cells in sponges serve as a protective barrier, helping to prevent pathogens and debris from entering the sponge's body. They also play a role in gas exchange and waste removal by allowing for the diffusion of molecules across their cell membranes. Additionally, epidermal cells can secrete substances that aid in capturing food particles from the water.
Guard cells contain chloroplasts, which are responsible for photosynthesis, while other epidermal cells do not typically contain chloroplasts. Chloroplasts are important for the production of sugars and energy through the process of photosynthesis in guard cells.
The folds on epidermal cells, called microvilli, increase the cell's surface area for absorption and secretion. This increased surface area allows for more efficient exchange of molecules such as nutrients and waste products with the external environment.
Epidermal cells surround the stomata.
iris
epidermal ridge
The structure of an onion epidermal cell consists of a cell wall, cell membrane, cytoplasm, and a large central vacuole. The function of an onion epidermal cell is to provide protection for the plant, regulate water and nutrient uptake, and help with gas exchange through stomata.
The cell membrane is the semipermeable structure in an onion epidermal cell. It regulates the passage of molecules in and out of the cell, allowing only certain substances to pass through while restricting others.
Filamentous cytoskeleton is the cellular structure within the cytoplasm in every cell that helps it to keep its structure, protect the cell and allows cellular motion (using appendages like flagella, cilia, etc.). It also plays a role in intracellular transport and cellular division. The cytoskeleton is found in Eukaryotic and Prokaryotic cells.
The tough protective protein found in epidermal cells is called keratin. Keratin helps to provide strength and structure to the skin, hair, and nails.
To examine leaf epidermal cells, a leaf sample is typically cleared with a clearing solution to make the cells transparent. The cleared leaf sample is then mounted on a slide with a drop of water and covered with a coverslip. Finally, the sample is observed under a microscope to study the size, shape, and structure of the leaf epidermal cells.
Filamentous algae consists of long, thread-like strands made up of multiple cells joined end-to-end. These strands can be branched or unbranched, forming a mat-like structure. The cells of filamentous algae contain chlorophyll for photosynthesis and can reproduce by fragmentation or forming spores.
This description matches a structure called a myofibril, which is found in muscle cells. Myofibrils are made up of repeating units called sarcomeres that give them a banded appearance. They are responsible for muscle contractions by interacting with motor proteins.
Epidermal cells in sponges serve as a protective barrier, helping to prevent pathogens and debris from entering the sponge's body. They also play a role in gas exchange and waste removal by allowing for the diffusion of molecules across their cell membranes. Additionally, epidermal cells can secrete substances that aid in capturing food particles from the water.
Guard cells contain chloroplasts, which are responsible for photosynthesis, while other epidermal cells do not typically contain chloroplasts. Chloroplasts are important for the production of sugars and energy through the process of photosynthesis in guard cells.