Animal cells do not have cell walls because they do not need them. Cell walls, which are found in plant cells, maintain cell shape, almost as if each cell has its own exoskeleton. This rigidity allows plants to stand upright without the need for bones or musculature.Continue Reading
It is generally an advantage for plants to stand upright and grow as tall as possible. Plants need sunlight, so growing taller than neighboring plants make it more likely that the plant will survive and successfully reproduce. For animals, height may be an advantage sometimes as well, but most animals have skeletons and musculature. They do not need the rigid network that cell walls provide to stand upright.
Furthermore, most animals can move, and this capability is an enormous advantage when it comes to feeding, finding a mate and escaping from predators. If animals had cell walls in the same way plants do, they would be incapable of movement. Animals that do not move, such as coral and sea sponges, tend to grow in communal groups and develop structures that are very plant-like.
Animals and plants evolved differently, each according to different sets of needs. For animals, mobility was a greater advantage. Having cells without the rigidity of cell walls meant greater flexibility and motility.Learn more about Biology
A good analogy for the cell wall is a sturdy fence or wall surrounding a castle, protecting the structure from harm and only allowing entrance by outsiders through specified gates and openings. In this scenario, the wall also keeps inhabitants safe inside, preventing them from venturing out into potential danger.Full Answer >
Cell walls are located around the plasma membranes of certain types of cells. Cell membranes protect the cell, but cell walls have many extra functions, including providing an extra layer of protection and giving cells a more rigid structure.Full Answer >
Some 3D animal cell project ideas to make at home include clay or Styrofoam cell models, edible cells with candy or Jell-o or kitchen scrap cells. Animal cell kits are also available for purchase from companies like Home Science Tools.Full Answer >
A haploid cell is one that contains only a single set of chromosomes. In humans, a haploid cell consists of 23 chromosomes. Both sperm and egg cells are haploid.Full Answer >