The organ systems are similar in terms of function and anatomy, starting from amphibians to higher animals. Cells, tissues, and organs. The liver is the largest internal organ in the human body, which weighs between 1.3 to 1.5 kg. An organism is a living being that has a cellular structure and that can independently perform all physiologic functions necessary for life. There are several levels of organization to this structure, with each level more complex than the last. Cells in a human body are of different types based on their structure and function. The Organization and Structure of the Human Body The Organization and Structure of the Human Body The human body is made up of a complex structure of systems that all work together. Characteristic of the vertebrate form, the human body has an internal skeleton with a backbone, and, as with the mammalian form, it has hair and mammary glands. Human body, the physical substance of the human organism. Function, size, and shape may differ. In the same way, the human body functions a lot like a city, with separate units designated for specific functions, but all working together for a common purpose. You need a microscope to see them. Cells are very small. The different organ systems in the human body include. So, if an organ is damaged, it means the cells and cell structure in the organ are also damaged. For example, the liver is a part of the digestive system but also plays a prominent role in the excretion system. Cells need food, water, and oxygen to live and function. The organism level is the highest level of organization. The skin acquires an area of 19 to 20 square feet on our body surface. Refer More: Structure and function of the skin. Cells have the same basic structure. Learn more about the composition, form, and physical adaptations of the human body. Figure 1.2.2 – Organ Systems of the Human Body: Organs that work together are grouped into organ systems. A group of cells from a tissue and a group of tissues form an organ.. A group of organs makes up an organ system and a group of organ systems make up the human body.. See Chapter 10 for changes in body structure and function that occur with aging. Liver. It helps metabolize drugs and other waste from the body through urine. The basic unit of body structure is the cell. Therefore, it is called the largest external organ of the human body. Scientifically, a Cell is the basic unit of life.
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