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Body Organization

Body Organization. Biolo gy Grade 9 Prepared by teacher: Ronak Ahmed Duhok International School 2012-2013. How will you feel at first when you jumping into a lake?. Homeostasis: the maintenance of a constant internal state in a changing environment.

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Body Organization

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  1. Body Organization Biology Grade 9 Prepared by teacher: Ronak Ahmed Duhok International School 2012-2013

  2. How will you feel at first when you jumping into a lake? • Homeostasis: the maintenance of a constant internal state in a changing environment. You feels very cold, and ever you may shiver. Eventually you get used to the cold water. How? This is because of Homeostasis

  3. Cells, Tissues, and Organs Is it easy to maintain homeostasis? No, because your internal environment is always changing. • Your cells need nutrients and oxygen to survive. • Your cells need wastes removed. • If homeostasis is disrupted, cells may not get the materials they need. So, cells may be damaged or may be die.

  4. Cells form Tissues Your cells must do many jobs to maintain homeostasis. • Can each cell of your body do all of those jobs? Each cell in your body has a job in maintaining homeostasis like each person on a soccer team Soccer

  5. Cells are organized as a group • A group of similar cells working together forms ( Tissue)

  6. How many kinds of Tissue are in your body? Joins, supports, protects, insulates, nourishes, & cushions organs • Connective tissue • Muscle tissue • Nervous tissue • Epithelial tissue Is made of cells that contract & relax to produce movement Sends electrical signals through the body. It is found in the brain, nerves, & sense organs. Covers & protect underlying tissue

  7. Tissues form Organs Can one kind of tissue do all of the things that several kinds of tissue working together can do? No, one kind of tissue cannot do that alone If two or more tissues working together……… It will form an organ Organ: a collection of tissues that carry out a specialized function of the body Give an example of organ need the four kinds of tissue to carry out its function Stomach is an organ, it uses all four kinds of tissue to carry out digestion

  8. Layers of muscle tissue break up stomach contents Blood & another connective tissue called collagen are found in the wall of the stomach Partly controls the production of acids that aid in the digestion of food. Nervous tissue signals when stomach is full Lines the stomach

  9. Organs form Systems Is stomach do that all? Alone? stomach • Which organ is digesting the food? No, stomach works with other organs, such as the small & large intestines, to digest the food Organs that work together make up an organ system

  10. Self-Check • How is the stomach part of an organ system? The stomach works with other organs, such as the small & large intestines, to digest food.

  11. Working together There are 11 organ system in your body working together to maintain homeostasis. Such as: Including: Including: Lungs Works with heart blood vessels Cardiovascular system Respiratory system The cardiovascular system picks up oxygen from the lungs & carries the oxygen to cells in the body. These cells produce carbon dioxide (CO2), which the cardiovascular system returns to the respiratory system. The respiratory system expels the CO2.

  12. Endocrine system Your glands send out chemical messages. Ovaries & testes are part of this system ghgjhkijiuhjgjhygj ghgjhkijiuhjgjhygj Integumentary system Your skin, hair, & nails protect the tissue that lies beneath them Skeletal system Your bones provide a frame to support & protect your body part Muscular system Works with the skeletal system to help you move Cardiovascular system Your heart pumps blood through all your blood vessels. Respiratory system Your lung absorb oxygen & release carbon dioxide

  13. Nervous system Receives & sends electrical messages throughout your body Digestive system Breaks down the food you eat into nutrients that your body can absorb Urinary system Removes wastes from the blood & regulates your body’s fluids Male Reproductive system Produces & delivers sperm Lymphatic system Returns leaked fluids to blood vessels & helps get rid of bacteria & viruses Female Reproductive system Produces eggs & nourishes & protects the fetus

  14. Self-Check • Give an example of how organ systems work together in the body. The cardiovascular system includes the heart & blood vessels. These organs are also part of the circulatory system, which includes blood. Together, these systems deliver the materials cells need to survive.

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