According to the cell theory, the cell is the smallest form of life but there are many parts of a cell which allow the cell to do the job it is assigned correctly. An example of a cell would be the animal cell, which is a eukaryotic cell or a cell that contains a plasma membrane. Inside the membrane there are parts of the cell called the organelles. (Animal Cell Structure, 2005) Organelles inside the cell have specific jobs to perform for the cell, organelles include the ribosomes, vacuoles, centrioles, lysosomes, peroxisomes, cilia, flagella, mitochondria and the endoplasmic reticulum. In addition there are also three main components to any cell. These include the cell membrane, cytoplasm and nucleus.
The most common fluid inside the cell is the cytoplasm. The cytoplasm is contained inside the cell membrane and it surrounds all of the organelles. It is a thick solution and it is inside every single cell. Usually the cytoplasm has a majority of water, salts and proteins. The part of the cytoplasm that do not contain organelles is called the cytosol. The cytoplasm may appear to have no structure but it highly organized through the cytoskeleton, which provides the cytoplasm and the cell the structure it requires. (Cytoplasm, n.d) One of the main parts of the cell is the nucleus which is usually located in the center of the cell in a typical animal cell as seen in Figure 1. The nucleus is dark, round and surrounded by a nuclear membrane which is selectively permeable. (Cell Organelles Notes, n.d) In addition, the nucleus processes information and is the administrative center of the cell. The nucleus stores things such as DNA and it correlates the actions of the cell such as growth, intermediary metabolism, protein synthesis and mitosis and meiosis or cell division. (Animal Cell Structure, 2005) Also, the nucleus contains nucleoplasm, which is fluid inside the nucleus. It is made up mostly of water, molecules and dissolved ions. It supports the chromosomes inside the nucleus. (Function of the Nucleoplasm, n.d) A similar membrane is located on the outside of the cell called the Cell Membrane. The cell membrane is a bilayer selectively permeable phospholipid membrane. Bilayer means that there are two layers. The layers are made of phosphate and lipids with the phosphate heads being hydrophilic and the lipid tails being hydrophobic. The lipid bilayer contain proteins inside it as seen in Figure 2. The proteins do the most important part of the cell membrane. The arrangement of proteins and phospholipids is called the fluid mosaic model for a cell membrane. The cell membranes act as fluid because the molecules remain in motion. The mosaic part of the fluid mosaic model means that the proteins are inside the phospholipids. Also, the cell membrane is selectively permeable. This means that some substances can pass through it but others cannot. Sometimes this requires no energy, which is called passive transport. On the other hand active transport requires energy for substances to pass through the membrane. (Structure of Plasma Membranes, n.d) Inside the cell membrane there are many organelles. One of these include the endoplasmic reticulum. There are two types of endoplasmic reticulum, one which is rough and the other is smooth. Both serve a similar function which is to carry materials throughout the cell. It is also a network of sacs that processes and transports chemicals inside and outside the cell. The rough endoplasmic …show more content…
These parts are called organelles and every animal cell contains them, like how every living thing contains cells. The nucleus is the main control point of the cell which commands all organelles. The cell membrane is the guard of the cell which is selectively permeable. The cytoplasm surrounds all organelles in the cell and in combination with the cell membrane, provide the cell the structure. The mitochondria provide the cell with power while the vacuoles stores nutrients for the cell. There are more organelles such as the ribosomes, lysosomes, centrioles, Golgi apparatus, peroxisomes and the cilia and flagella that all do certain jobs for the cell and require the cell to function. These parts or organelles may not be living, but they are still important for every living
The most common fluid inside the cell is the cytoplasm. The cytoplasm is contained inside the cell membrane and it surrounds all of the organelles. It is a thick solution and it is inside every single cell. Usually the cytoplasm has a majority of water, salts and proteins. The part of the cytoplasm that do not contain organelles is called the cytosol. The cytoplasm may appear to have no structure but it highly organized through the cytoskeleton, which provides the cytoplasm and the cell the structure it requires. (Cytoplasm, n.d) One of the main parts of the cell is the nucleus which is usually located in the center of the cell in a typical animal cell as seen in Figure 1. The nucleus is dark, round and surrounded by a nuclear membrane which is selectively permeable. (Cell Organelles Notes, n.d) In addition, the nucleus processes information and is the administrative center of the cell. The nucleus stores things such as DNA and it correlates the actions of the cell such as growth, intermediary metabolism, protein synthesis and mitosis and meiosis or cell division. (Animal Cell Structure, 2005) Also, the nucleus contains nucleoplasm, which is fluid inside the nucleus. It is made up mostly of water, molecules and dissolved ions. It supports the chromosomes inside the nucleus. (Function of the Nucleoplasm, n.d) A similar membrane is located on the outside of the cell called the Cell Membrane. The cell membrane is a bilayer selectively permeable phospholipid membrane. Bilayer means that there are two layers. The layers are made of phosphate and lipids with the phosphate heads being hydrophilic and the lipid tails being hydrophobic. The lipid bilayer contain proteins inside it as seen in Figure 2. The proteins do the most important part of the cell membrane. The arrangement of proteins and phospholipids is called the fluid mosaic model for a cell membrane. The cell membranes act as fluid because the molecules remain in motion. The mosaic part of the fluid mosaic model means that the proteins are inside the phospholipids. Also, the cell membrane is selectively permeable. This means that some substances can pass through it but others cannot. Sometimes this requires no energy, which is called passive transport. On the other hand active transport requires energy for substances to pass through the membrane. (Structure of Plasma Membranes, n.d) Inside the cell membrane there are many organelles. One of these include the endoplasmic reticulum. There are two types of endoplasmic reticulum, one which is rough and the other is smooth. Both serve a similar function which is to carry materials throughout the cell. It is also a network of sacs that processes and transports chemicals inside and outside the cell. The rough endoplasmic …show more content…
These parts are called organelles and every animal cell contains them, like how every living thing contains cells. The nucleus is the main control point of the cell which commands all organelles. The cell membrane is the guard of the cell which is selectively permeable. The cytoplasm surrounds all organelles in the cell and in combination with the cell membrane, provide the cell the structure. The mitochondria provide the cell with power while the vacuoles stores nutrients for the cell. There are more organelles such as the ribosomes, lysosomes, centrioles, Golgi apparatus, peroxisomes and the cilia and flagella that all do certain jobs for the cell and require the cell to function. These parts or organelles may not be living, but they are still important for every living