Rourkeis Enciclipaedia World of Science. Human Life by Marcia S. Freeman

By Marcia S. Freeman

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An abrasion is a scrape, a laceration is a cut, and a puncture is a hole. You can get injured falling off your bicycle. with a hard object, you might bruise your brain. Bruising to the brain is a concussion. A concussion is dangerous because there is usually internal bleeding. You may become dizzy or feel sleepy. Most concussions heal with plenty of rest. Bruises If you fall or hit something, you will probably develop a bruise. You can see a bruise because blood vessels break under the skin and the area turns red, purple, yellow, and even green.

Bacteria or viruses, parasitic worms, or fungi and molds. Some can make us sick. They can cause an infection. Some common bacterial infections cause the following symptoms: Pneumonia: lungs filling with fluid, coughing, weakness Strep throat: sore and red throat with white spots, difficulty swallowing, fever Pink eye: red rimmed eyes, excessive mucus, itching If a wound is deep and won’t stop bleeding, adhesive strips or stitches are used. clot (klot): a solidified clump of blood cells and plasma internal (in-TUR-nuhl): inside the body suffer (SUHF-ur): to experience pain, discomfort, or sorrow tetanus (TET-nuhss): a sometimes fatal bacterial disease that causes your muscles to become rigid.

The last teeth to come in are the four back molars, called wisdom teeth. Very often they do not come Molars Canine Incisors Canine Children enter a stage of life called adolescence generally between the ages of 9 and 12. It is the time when the bodies of children begin to grow into their adult sizes. Adolescence begins with puberty and ends with adulthood. Puberty Puberty is when the bodies of males and females change and it becomes possible for them to reproduce. Puberty lasts from two to four years.

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