Satisfactory Essays
Plants in a jungle, bugs in a garden, shrimp in the sea, and lions in the wild, all of these living things are made up of many cells. Several of living things are made up of many cells that work together. There are some living things that only have a single cell like protozoa and bacteria. Cells are very small and can only be seen through a microscope. All cells have different functional roles inside a living a thing. For example nerve cells have lengthy and slender extensions that help send signals through the living thing.
No matter how different cells can be they all have a similar role of keeping what is supposed to be outside out , and they what is supposed to be inside in. Cells are enclosed by a complex called the cell membrane. A cell membrane is also known as a plasma membrane. The purpose of a cell membrane is to be a barrier between a cell's external and internal environments. All cells are composed of organic molecules such as lipids, proteins, carbohydrates, and nucleic acids. These organic molecules are very important to a cell's functions.
Lipids are another form of fat molecules that are components of a cell membrane. Proteins are organic molecules that are important in all living things. Proteins that are called enzymes make cellular molecules into other forms that can help a cell take out waste, help build support structures, or help the cell meet the energy that it needs. Carbohydrates are another important organic molecule that is the sugars and starches in a cell. Nucleic acids are molecules that assist to express a cell's genetic code. Nucleic acids have two different classes called deoxyribonucleic acids also known as DNA and ribonucleic acids also known as RNA.
A cell is made up 70 percent of water an...

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...ike the plant cells animals can create their own food. An animal cell doesn't have a cell wall, but a plant cell does have a cell wall.
An animal cell has a flexible membrane unlike the plant cell it doesn't have flexible membrane. That is the reason why animal cells come in many different shapes and sizes and the reason why plant cells don't come in different shapes and sizes. Plastids are located inside a plant cell, but plastids are not found inside an animal cell. A plant cell has a big vacuole that takes up 90 percent of the cell's space the animal cell has vacuoles that are much smaller the plant cell's vacuole. The biggest difference between plant cells and animal cells is that plant cells are able to make their own food and animal cells are not able to make their own food. Animals have to go and find their food unlike plants that can provide their own food.
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