Trabajo De Ciencias De Cirstian Mendoza

CELL IN THE INTESTINE  Intestine is made of 20 large epithelial cells which

form a tube and are mostly situated as bilaterally symmetric pairs around the tubular lumen. Each of these cell pairs forms an intestinal ring ( II-IX int rings). The most anterior intestinal ring (int ring I), however, is made of four cells (AlimFIG1). Intestinal cells contain large nuclei with large nucleoli and numerous autofluorescent granules in their cytoplasm (See IntFIG7 below). Although the intestine initially fills the entire body cavity behind the pharynx, it eventually becomes deflected to permit the outgrowth of the gonad within the same cavity as the animal grows older (IntFIG1-4). The intestine is not rigidly attached to the bodywall but is firmly anchored to the pharyngeal and rectal valves at either end

FAT CELL  A little more than half of the adults in

the United States are overweight. Statistics show that an incredible 65.2 percent of the U.S. population is considered to be "overweight" or "obese." According to the Centers for Disease Control and Prevention (CDC), obesity and overweight status is determined in adults by finding a person's "Body Mass Index" or BMI

NERVE CELL  Many nerve cells are of the basic type

illustrated above. Some kind of stimulus triggers an electric discharge of the cell which is analogous to the  discharge of a capacitor. This produces an electrical pulse on the order of 50-70 millivolts called an acti The electrical impulse propagates down the fiber-like extension of the nerve cell (the axon). The speed of transmission depends upon the size of the fiber, but is on the order of tens of meters per second - not the speed of light transmission that occurs with electrical signals on wires.on

BLOOD CELL  Red blood cells are the most common

type of blood cell and the vertebrate body's principal means of delivering oxygen to the body tissues via the blood. They take up oxygen in the lungs or gills and release it while squeezing through the body's  capillaries. The cells are filled with  hemoglobin, a biomolecule that can bind to oxygen. The blood's red color is due to the color of oxygen-rich hemoglobin. In humans, red blood cells develop in the  bone marrow and live for about 120 days; they take the form of flexible biconcave disks that lack a cell nucleus and organelles  and they cannot synthesize protein

CELLS IN THE WALL  A cell

wall is a tough, flexible and sometimes fairly rigid layer that surrounds some types of cells. It is located outside the cell membrane and provides these cells with structural support and protection, and also acts as a filtering mechanism. A major function of the cell wall is to act as a pressure vessel, preventing over-expansion when water enters the cell. They are found in  plants, bacteria, fungi, algae, and some archaea. Animals and protozoa do not have cell walls.

CELLS IN THE NOSE