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Sreeshan · 2024-01-31T06:21:42.845Z

What is a Cell: • The cell is a fundamental building block of life like quarks build protons, and protons build an atom. The Cells build up everything in a living thing's body. From heart and bone to everything you have in your body, is made up of cells. • There are many kinds of cells, from Fat cells to Skin cells, and Blood cells to muscle cells. Different kinds of cells have their function and way of doing things. Their function, shape, and even their system change, but still they are all connected and function together to create and help "Us!", without cells, we wouldn't be there. Few cells in our body, their function, and location: Epithelial cells: • Function: Provide lining and covering for organs and tissues. They also play a role in absorption, secretion, and protection. • Location: Found throughout the body, including the skin, lining of the digestive tract, respiratory system, and urinary tract. Connective tissue cells: • Function: Provide support, structure, and connection for other tissues. They also produce substances such as collagen and elastin, which give tissues their strength and flexibility. • Location: Found throughout the body, including bones, tendons, ligaments, cartilage, and blood. Muscle cells: • Function: Enable movement and contraction. • Location: Found in the muscles of the skeleton, heart, and digestive system. Nerve cells: • Function: Transmit information throughout the body. • Location: Found in the brain, spinal cord, and nerves. Red blood cells: • Function: Transport oxygen throughout the body. • Location: Found in the blood. White blood cells: • Function: Defend the body against infection and disease. • Location: Found in the blood and lymphatic system. Complexity of a cell: Cells are a complex but important thing when learning about cells, we will come across Eukaryotic and prokaryotic cells, they are the two types of cells. The simple difference between the two types of cells is that Eukaryotic have a nucleus and prokaryotic cells have a nucleoid. Eukaryotic cells: • We humans are made up of eukaryotic cells, and so are animals and plants. The nucleus serves both as the repository of genetic information and as the cell's control center. • If simply said: "Imagine the nucleus of a cell as the brain and library combined. It's like a control center because it regulates what happens in the cell, making sure everything runs smoothly. Now, for the library part – it stores all the important genetic information, like a bookshelf full of instructions on how the cell should work and grow. So, in simple terms, the nucleus is like the boss that manages the cell's operations and keeps the essential genetic playbook safe." Membrane-bound Organelles: • Eukaryotic cells have various compartments with specific functions, like the endoplasmic reticulum, Golgi apparatus, mitochondria, and more. Each of these is like a specialized department handling different tasks to keep the cell running smoothly. Complex structure: • These cells are typically more complex in structure, with a defined cell membrane, cytoplasm, and nucleus, giving them a clear organization compared to the simpler prokaryotic cells. Mitochondria: • Often called the powerhouse of the cell, mitochondria are where energy production happens through cellular respiration. They're like tiny energy factories. Cytoskeleton: • Eukaryotic cells have a dynamic framework called the cytoskeleton, providing structural support and facilitating cell movement and shape changes. Reproduction: • Eukaryotic cells can reproduce through mitosis (cell division) for growth and repair and meiosis for sexual reproduction.

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Sreeshan

Jan 31

Cell (Chapter 3, biology)

in Sreeshan

What is a Cell:

The cell is a fundamental building block of life like quarks build protons, and protons build an atom. The Cells build up everything in a living thing's body. From heart and bone to everything you have in your body, is made up of cells.
There are many kinds of cells, from Fat cells to Skin cells, and Blood cells to muscle cells. Different kinds of cells have their function and way of doing things. Their function, shape, and even their system change, but still they are all connected and function together to create and help "Us!", without cells, we wouldn't be there.

Few cells in our body, their function, and location:

Complexity of a cell:

2 comments

Comments (2)

Malu

Jan 31

Q.1. What is the importance of a vacuole in a plant cell?

Q.2. What is a satellite chromosome?

Q.4. State the characteristics of prokaryotic cells.

Q.5. Describe the cell theory in brief.

Q.6. Why are mitochondria known as the “powerhouse of the cell”?

Q.7. Who Discovered the cell?

Q.8. What are Thylakoids?

Q.9. Which is the largest single cell?

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