The body is a whole bunch of stuff covered in skin. 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.. Tissues are somewhat more complex units than cells. Carbon, the basic unit for organic molecules, comes in second. Despite the fact that we have gobs of prokaryotic cells living inside and on us, humans are still categorically eukaryotic organisms. Cells have many parts, each with a different function. Cells also contain the body’s hereditary material and can make copies of themselves. On the other hand, the human cells in your body form all types of material you’re made of. So, if an organ is damaged, it means the cells and cell structure in the organ are also damaged. Oxygen, carbon, hydrogen, nitrogen, calcium and phosphorus are the elements that make up 99 percent of the human body's mass. Scientifically, a Cell is the basic unit of life. The human body, like all organic compounds, contains a significant amount of carbon. Learn more about the composition and function of bone. The most common figure is that around 60 per cent of your body is water – even your bones are about 30 per cent aqueous. Your bones, and your teeth, your brain and all your body fluids including blood and, well, urine. Organs. To answer this question I’m going to start by talking about bigger things and moving us down into smaller things. Bone tissue makes up the individual bones of the skeletons of vertebrates. There’s enough structure to make it unlikely that you will run down the drain, but there is plenty of water there. This means that all human cells —including those found in the brain, the heart, the muscles, and so on—are also eukaryotic . Every living thing is composed of cells. Water's "stickiness" (from surface tension) plays a part in our body's ability to transport these materials all through ourselves. The cells in our bodies are full of water. This is where the reference man comes in - narrowing down the sex, age, weight, and height of a hypothetical human made it a whole lot easier for the reviewers to figure out what the average number of human cells would be. Its two principle components are collagen and calcium phosphate. Cells make up tissue, tissue makes organs, organs make up organisms. Those muscles you work so hard to build, and that fat you always meant to lose. Tissues. So let’s focus on skin for a moment. Before you start thinking we should float away with all the oxygen, hydrogen, and nitrogen atoms, remember that the oxygen molecules are mainly part of the water in our body (H2O). Not all of the numerous other elements found in the human body actually play a significant role in human life. Therefore, it isn't surprising that most of a human body's mass is oxygen. It might seem unlikely: the body feels quite solid. The human body is made of all of the above. Is the human body made up of eukaryotic cells? The four elements are oxygen, hydrogen, carbon, nitrogen. Bone, rigid body tissue consisting of cells embedded in an abundant hard intercellular material. The human body is composed of trillions of cells. For their reference man, it's about 30 trillion, the researchers estimate. In fact, over half of the human body is made up of water (50-70%). They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. The excellent ability of water to dissolve so many substances allows our cells to use valuable nutrients, minerals, and chemicals in biological processes. Most of the human body is made up of water, H 2 O, with bone cells being comprised of 31% water and the lungs 83%. Let’s start with the human body. The human body, which is made up of numerous cells, begins as a single, newly fertilized cell. But most of you is made up of cells filled with water. 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