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Olivia Carmody and Monique Danhiez on the skeletal system.

How many bones do we have? When you were a baby you had over 300 bones. When you grow your bones start to fuse together, then when you become an adult you only have 206 bones all together.

How do our bones move? Bones can only move with some help from the muscles. With muscles and joints they are responsible for you to be able to move. The muscles move the bones by the muscles contracting and because they are attached they move various body parts one at a time.

Are your bones alive? Bones are made of a mix of hard stuff that gives them strength and tons of living cells that helps strengthen and repair themselves. Like other cells in your body, the bone cells rely on blood to keep them alive. Blood brings them food and oxygen and takes away waste.

What's bone marrow? Our bones feel hollow. Their hollowness makes them strong and light. It's in the center of many bones that bone marrow makes new red and white blood cells. Red blood cells ensure that oxygen is cared to all parts of your body and white blood cells ensure you are able to fight germs and disease.

Olivia Carmody did all the work the digestive system.   **The esophagus runs from the pharynx to the diaphragm, to the top of the stomach. The Esophagus is about 25 cm. The esophagus is really a large muscle which pushes food down to the stomach. The walls of the esophagus are lined with four layers of thin tissue. These membranes are the mucosa, the submucosa, the muscularis externa, and the serosa. **
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 * he mouth and teeth are the first organs of the digestive tract. The teeth are bones whose primary purpose is to grind food into small little bits that the body can digest easy. In the mouth, a base known as saliva helps begin to separate the chemical makeup of food. There are certain organs that are located in the mouth, such as the uvula, the tongue, and the organ that connects the tongue to the base of the mouth (frenulum). The walls of the inner cheeks are lined with mucous which help protect the food from bacteria, and also protect the cheeks form saliva. **
 * he mouth and teeth are the first organs of the digestive tract. The teeth are bones whose primary purpose is to grind food into small little bits that the body can digest easy. In the mouth, a base known as saliva helps begin to separate the chemical makeup of food. There are certain organs that are located in the mouth, such as the uvula, the tongue, and the organ that connects the tongue to the base of the mouth (frenulum). The walls of the inner cheeks are lined with mucous which help protect the food from bacteria, and also protect the cheeks form saliva. **
 *  The Pharynx is the passage way through which many tubes run from the mouth and the nose to the upper body. Some of these tubes are the nasopharynx and the oropharynx that run oxygen to the lungs. **
 * Edited by Olivia Carmody & Daniel Richardson **