Human Body System Essay

explanatory Essay
1645 words
1645 words

The human body has 206 bones, which the bones in the human body system is used for; a framework and support the body, allows for internal organ protection, more efficient body movement, produce red blood cells in the bone marrow, and stores minerals. There are two different types of skeletons in the body which are axial; with the skull, vertebral column, ribs, and the sternum and the appendicular; with the arms, legs, shoulder, hip, wrist, ankles, finger, and toes. There are also joints in the skeletal system where two or more bones meet which include; bones, ligaments, muscles, tendons, and nerves. Bones act as levers and magnify the force provided by muscles contraction. Tendons are thick bands of connective tissues to attach muscles to bones. …show more content…

Blood is composed of fluid, cells, fragments of cells, and transportation of nutrients, oxygen, carbon dioxide, hormones, antibodies, urea, and heat which are produced by red bone marrow. Blood transports oxygen and carbon dioxide but lacks a nucleus, contains hemoglobin, iron containing protein, and oxygen is loosely connected to hemoglobin in blood cells. There are also white blood cells which are large in size and contain a nucleus and there are several different types of white blood cells which include B Cells and T Cells; Basophil, Eosinophil, Neutrophil, Monocyte, Defense & immunity, Platelets, Cell fragments need for blood clotting. There is also plasma which transports red and white blood cells, platelets, nutrients, enzymes, hormones, gases, and inorganic salts. Platelets attach to the damages area and then clotting happens. These platelets are made in bone marrow. There are three types of blood vessels. One type is called an artery and it is large and ha high internal pressure with thick walls and no internal muscular valves. The next type is capillaries which carry blood away from the heart, they are microscopic, with only one cell thick walls, no internal valves, allows for nutrients and gases to diffuse easily between cells and tissues, and forms a dense network that allows for blood to reach all over the body. The next type of blood vessels are vein which carry blood back to the heart that are not …show more content…

There are many different infectious organisms that can harm the human body so antigens are produced by the bodies’ immune system to help fight the infectious organisms. There are also antibodies that are produced by the body and target specific viruses and bacteria to get rid of them. Each different antibody is cloned when the virus or bacteria is identified to fight it off. There are also different forms of defense which include skin, mucus membranes, physical and waterproof barriers, and cells shed so microbes don’t colonies. Mucus is important in trapping and not letting and harmful organisms get inside of the body mucus is also constantly getting produced to help keep the body safe. White blood cells help to engulf the harmful organism and when they get inside of the body that called phagocytosis. Macrophages also remember whether the cell is elf or it’s not itself based in proteins. There is also an inflammatory response to when there is an injury or infection so there is blood flow that cases redness and heat. When there is a more widespread infection inside of the body the white blood cells release pyrogens which cause the body temperature to increase. There are specific types of antibodies that are produced to be able to fight against the infection; these cells are called A lymphocytes and B lymphocytes. These antibodies will circulate inside of the blood stream to find the infection and help eliminate it. There also some

In this essay, the author

  • Explains that the human body has 206 bones, which are used for internal organ protection, more efficient body movement, red blood cells, and minerals.
  • Explains the muscles system, which includes smooth muscles, involuntary muscle, and voluntary muscle. muscles give force and cause movement attached to bones.
  • Explains how the digestive system turns food into small molecules for the body to absorb and use as energy.
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