* Whole cells – sperm swimming (to reach the egg sperm need to swim 7500 times its own length to reach the egg and without energy it would be impossible to do) * Tissues – muscles control
* Whole organs – heart beating
* Parts of whole organisms such as walking and talking.
Also we need the energy from respiration to maintain our body at a constant 37C as we human are warm blooded which can advantage or disadvantage us. Being warm blooded can disadvantage as warm-blooded bodies are providing nice and warm environment for viruses, bacteria’s and parasites to live in. The advantage of being warm blooded is that we can move then it is cold, as if we were cold blooded we wouldn’t be able to move during the cold weather. As much as we need energy we also need food to keep us alive for humans food is like fuel and without it we would die. We need food to get energy to help us grow and repair damaged cells and tissues. Also it is important to keep a balanced diet to prevent becoming underweight or overweight. When the body is taking more energy from food than is necessary the oversupply will be stored under the skin as a fat and it will also start surrounding intered organs such as heart. Also the location of a body fat is different in terms of sex hormones e.g. males tend to store the fat around their waist area, while women fat can be stored around buttocks or thighs. When body is not getting enough energy from the food the body has to take out stored fat and protein. Then when supplies are still low body is using the actual fabrics such as muscles they keep disappearing as the body has to keep supplying different parts of the body to keep alive. Everybody has their own metabolism. Metabolism is the amount your body converts food into energy for activity, functions needed for living and the repairing of damaged tissue. Metabolism is always working whether we are sleeping, sitting, reading or exercising. Greatest way to use our metabolism to its fullest potential is to burn an excess of calories during the exercise and then rest. This will allow our metabolism to take over and repair the damage it needs and continue to burn calories as we continue with daily routine. If we will keep this cycle our metabolism will conform this cycle: eat, take in fuel, exercise, burn calories and rest to repair damage.
The mean function of digestive system is to break down the larger fragments in food like protein and starch into their monomers (smaller molecules) amino acid and sugars- so that they will easier absorb into the body. After getting fed the food in our body need to travel certain distance around the body before being turned into energy. The food will pass through more than 22 feet of tubing, be mixed with chemicals from four different glands, be separated between useful and not useful elements...