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Plants have cell walls, while animals do not, due to differences in their evolutionary history, structure, and the functions of their cells.
Plants:
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**Structural Support:**
- The primary function of plant cell walls is to provide structural support to plant cells. Plant cells have a rigid cell wall composed mainly of cellulose, a complex carbohydrate. This rigid structure helps plants maintain their shape and withstand the pressure generated by the influx of water during osmosis.
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**Protection:**
- Cell walls protect plant cells from external mechanical damage and pathogens. The tough and rigid cell wall acts as a barrier, preventing physical damage and helping to resist the entry of pathogens.
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**Water Regulation:**
- The cell wall also plays a role in regulating water balance. It allows water to pass through while preventing the cell from bursting due to excessive water uptake. This is crucial for turgor pressure, which helps maintain cell and plant rigidity.
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**Support for Growth:**
- As plants grow, new cells are continuously added. The cell walls allow for the elongation of cells while maintaining structural integrity.
Animals:
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**Extracellular Matrix:**
- Instead of cell walls, animal cells are surrounded by an extracellular matrix (ECM) made up of proteins and other molecules. The ECM provides structural support to animal tissues, but it is more flexible than the rigid cell walls of plants.
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**Cell-to-Cell Communication:**
- Animal cells rely on direct cell-to-cell communication through tight junctions, desmosomes, and gap junctions. The absence of rigid cell walls allows for greater flexibility and mobility in animal tissues.
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**Adaptation to Environment:**
- Animals have evolved a wide range of adaptations for mobility, and the absence of a rigid cell wall allows for more flexibility and the ability to change shape. This is crucial for processes like muscle contraction and the movement of cells during development.
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**Phagocytosis:**
- Animal cells, particularly certain immune cells, use a process called phagocytosis to engulf and digest particles. The flexibility of the cell membrane is essential for this process.
In summary, the presence of cell walls in plants and their absence in animals are adaptations that have evolved to suit the specific needs and lifestyles of each group of organisms. The rigid cell walls of plants provide structural support and protection, while the absence of cell walls in animals allows for greater flexibility, mobility, and adaptability to diverse environmental conditions.
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∙ 15y agowhy do plants have cell walls
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What do fungi and animals have in common?
A: They both have cell walls (they dont both have cell walls. whoever wrote that is wrong. animals do not have cell walls
Why dont animal cells have a cell wall?
Before answering this question, it is important to know the function of a cell wall. Cell walls are found in plants to provide rigidity to support the shape of the cell. Animals do not require those functions in cells, hence they do not need cell walls.
Which cell is lack of cell wall?
The type of cell that always lacks a cell wall is the animal
What do plant cells have that other cells dont?
Plant cells have CELL WALLs, thick protective coverings on the outside of the cell that surrounds the cell membrane.
What cells do animals have that plants dont?
Animals have: plasma membrane
Is any animal cell have cell wall?
no never only plants have cell walls as they dont have muscles to hold thhem up they require it we and other animals dont
What do fungi and animals have in common?
A: They both have cell walls (they dont both have cell walls. whoever wrote that is wrong. animals do not have cell walls
Why dont animal cells have a cell wall?
Before answering this question, it is important to know the function of a cell wall. Cell walls are found in plants to provide rigidity to support the shape of the cell. Animals do not require those functions in cells, hence they do not need cell walls.
Why do plant cells have cell walls but animal cells dont?
Well, a cell wall gives the plant cell it's straight structure, which makes the plant stand up and animals can support there own weight and plants need protection that gives the cell wall and animals dont need that protection.
Which pair of structures best shows that plant cells have functions different from animal cell?
plants cells have a cell wall animals dont
How does plant and animals cell differ?
one has legs and plants dont
How are plants different from animal?
Plants are different from animals because plants get their nutrients from the sun so that they can do the precoss of photosynthesis. Animals get their nutrients from eating other animals or plants. Also animals' cells are rounded shapes and plants' cells are rectangular. Animals also dont have chlorophyll while plants do. Animals take in oxygen released by plants and release carbon dioxide which is taken in by plants. Animals use their skeletal system for support and plants use fibers and turgor for support.Plants have a cell wall composed of cellulose and a cell membrane. Animals only have a cell membrane.I don't have all the answers, but for starters, I know animals require sustenance by eating and digesting food where as plants absorb nutrients through their roots. Animals need to procreate to develop offspring and plants may either spawn seedlings or be carried away by the ecosystem (weather, bees, water, etc.) to grow elsewhere. Some plants bear fruit, most absorb carbon dioxide and produce oxygen. Animals do not contribute to the ecosystem in this way.
Why do plant cells have cell walls and animal cell dont?
Plant cells have cell walls because they need the extra protection. This is because plant cells cannot move out of the way of danger like animals can.
Is a cheek cell an animal cell?
because the cheek cell is on the animal, as plants dont have cheeks. and because humans are animals too
How can you tell if there is a animal cell?
They dont have cell walls
What organelles best show that plant cells have functions different from animal cell?
plants cells have a cell wall animals dont
Why do fingernails not have cell walls but plant cells do?
it dose not have cell walls becuse they dont need them
