Lysosomes digest foreign materials and food, explains a Georgia State University website. These organelles contain digestive enzymes. Lysosomes keep cells clean and recycle materials. A cell contains many lysosomes. The lysosome has a plasma membrane surrounding it, which protects the rest of the cell from the destructive enzymes contained within the organelle.Continue Reading
Endocytosis is the process by which a lysosome digests substances. A lysosome has about 40 different enzymes used for digestion. These enzymes are made in the endoplasmic reticulum and packaged in the Golgi apparatus. Lysosomes usually originate from the pinching off of the Golgi apparatus, but they can also arise from endosomes.
After substances, such as cellular wastes, old organelles, fats, carbohydrates and proteins, are broken down in the lysosomes, the products are then released back into the cytoplasm to become the raw materials for the making of new substances and cellular structures. When a lysosome digests food, it meets up with a food vacuole and fuses with it, releasing its digesting enzymes into the vacuole. The process of digesting cellular components is autophagy; the process of engulfing and digesting food particles or foreign substances is called phagocytosis.
Although lysosomes dwell within all animal cells, many of them reside within white blood cells. Because white blood cells encounter foreign invaders and pathogens, they must be able to render the invaders harmless by digesting them within their lysosomes.Learn more about Human Anatomy
A diagram of the lymphatic system depicts the tonsils, thymus, lymph nodes and the spleen.The primary function of the lymphatic system is to transport lymph fluid containing white blood cells that rid the body of unwanted materials.Full Answer >
The primary function of the proximal convoluted tubule is to reabsorb most of the materials needed from the filtrate as it passes through the kidneys, explains HowStuffWorks. The proximal convoluted tubule reabsorbs approximately 65 percent of sodium and most of the water from the filtrate.Full Answer >
The circulatory system is important because it is transports blood and other materials throughout the body. Without the circulatory system, the body does not receive oxygen, and the heart and lungs fail to work.Full Answer >
Study materials for the ServSafe Food Handler test can be found at the SafeServ website in the resources section, where there are food safety guides and practice tests available. The ServSafe Food Handler test covers a variety of topics related to storage and hygiene as well as the proper cleaning and sanitation procedures that must be followed when preparing and serving food. The test also contains sections on understanding food allergies and the related customer service approaches.Full Answer >