Harmful Threats to the Human Body

Harmful Threats to the Human Body There are a lot of bacteria that are good for human bodies, but there are also a lot of bacteria that’s very harmful to the human body. Bad bacteria can affect people from swimming in lakes and ponds. â€Å"Many of the world's best-known disease outbreaks have been transmitted by water-borne bacterium. † Lakes and ponds are just un-treated drinking water. They have a lot of microorganisms in it that you cannot see. There are many ways to be contaminated by bacteria; you can swallow it, breathe it in, or they can get in an open wound.Being contaminated can cause skin infections, ear infections, eye infections, diarrhea, and respiratory infections. Langerhans cells and macrophages defend against microbes. Anyone can be infected by bacteria and there doesn’t have to be a lot of it in order to be infected. Vibrio cholera is a bacterium that causes cholera outbreaks around the world. Cholera isn’t common in the U. S. anymore bu t you should be careful when visiting out of state. Another bacterium found around the world is E. coli O157:H7. It produces a bloody diarrhea.It’s also a part of food contamination. It doesn’t take many organisms to get infected by this. Children and elderly are at high risk of severe illnesses. E. coli O157:H7 is even found in swimming pools. Leptospirosis is commonly transmitted by water contaminated by animal urine or soil that comes in contact with open wounds. It can either be barely noticeable or it can cause severe muscle pain. There are many different kinds of bacteria that can have a bad effect on the human body, especially in lake waters.A lot of people think that there is no way for your body to overheat, because of sweat. They think that sweating cools your body down so that it is impossible to overheat. That is wrong. If you get too hot too fast, your body cannot work fast enough to cool down. And if your body doesn’t eventually get cooler you can have a heat stroke or die. Lipid secretions also prevent dehydration. Symptoms of overheating are hard to breath, heart beats faster, you get dizzy, throwing up, and extreme dehydration.To keep from overheating you should drink lots of water and try to relax. When getting a sunburn your killing skin cells. After getting sunburn your skin tends to become red, sensitive to touch, and even warm. The outer layer of skin on your body is called the epidermis. Epidermis cells are the ones you can touch and see, they are also dead cells. The cells underneath that are living. They produce new dead cells to replenish your skin. The sun gives off ultraviolet light. Ultraviolet light is what kills the living cells.Nerve endings and receptors function to cause covering skin to prevent further sunburn. Sebum is lubrication of skin and hair. When your body senses dead cells your immune system starts working to heal your body. It increases blood flow in the affected areas, opening up capillary wall s so that white blood cells can come in and remove the damaged cells. The increased blood flow makes your skin warm and red. The nerve endings for pain begin sending signals to your brain. Damaged cells release chemicals that activate pain receptors. This is why sunburned skin is so sensitive.There are ways to prevent sunburn without having to stay inside. Use a sunscreen, which blocks ultraviolet light, or pace yourself so you get a tan first. When you get a tan, your body essentially creates its own sunscreen using special pigment cells in the epidermis. Deep cuts can become infected easily if it is not taken care of properly. Signs of infection are; redness or discoloration, swelling, warmth, pain, tenderness, scaling, itching, and pulse drainage. The skin may harden or tighten in the area and red streaks may radiate from the wound.Wound infections may also cause fevers, especially when they spread to the blood. While in the water and you happen to cut your foot; immediately lift up your foot to prevent a deeper cut. â€Å"Eccrine glands open by a duct directly onto the skin surface. When internal temperature rises, the eccrine glands secrete water to the skin surface, where heat is removed by evaporation. † There are many types of protective swim wear you can purchase to prevent organisms and chemicals from getting to your skin.