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Human bodyliannette


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Human bodyliannette

  1. 1. The Organization of the Human Body Presentation by Liannette Bellido Cintrón BIOLOGY AND GEOLOGY 3˚ ESO I.E.S. FRANCISCO RODRÍGUEZ MARÍN
  2. 2. • All living things are made up of cells, the most basic and fundamental unit. • Cells are capable, by themselves, of the three vital functions: nutrition, interaction and reproduction. • The cells in a multicellular organism come together to form a superior structure that carries out these funtions.
  3. 3. • Characteristics of multicellular organisms: – All the cells in a multicellular organisms cells come from the division of one initial cell, called the zygote or egg cell. – Despite all our cells come from one inicial cell, multicellular organisms are made up of different cells, specialized in different functions. – As a consecuence of the especialization of these cells, the organism shares the work between different systems. – All the cells of an organism co- ordinate their activities to allow a total activity of the organism. True or False? Human beings are multicellular organisms. TRUE!
  4. 4. • Cells that have similar form and characteristics, form tissues that are specialized in carrying out certain functions. – E.g Covering tissues, supporting tissues, storing tissues, muscle tissue etc. • Tissues join to form organs. Each organ carries out a specific function in the organism. For example, the heart pumps blood. Can you name other organs?
  5. 5. • A collection of organs that carry out related functions make up a system. – e.g Digestive system: • Can you name other systems?
  6. 6. • The collection of all organs and systems make up a multicellular organism. • The human being, like any living thing, carries out the 3 vital functions: Nutrition, interaction and reproduction. The body parts implicated in these functions are: – Nutrition – Interaction – Reproduction Digestive system Circulatory system Excretory system Respiratory system Nervous system Musculoskeletal system Endocrine system Sensory organs Male reproductive system Female reproductive system