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Understanding the Organization of the Human Body: From Cells to Organ Systems

This introduction explores the organization of the human body, highlighting how all living things are made of cells. It details the five levels of organization: cells, tissues, organs, organ systems, and organisms. Each type of cell has a specialized job, such as red blood cells that carry oxygen. Tissues consist of similar cells working together, and organs are made up of different tissues fulfilling complex functions. Organ systems are groups of organs that collaborate to perform major tasks essential for maintaining homeostasis and the overall health of the organism.

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Understanding the Organization of the Human Body: From Cells to Organ Systems

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Presentation Transcript

  1. Introduction to the Human Body: ? ? How are our bodies organized? ?

  2. Label your foldable… ORGANISM (body) ORGAN SYSTEMS ORGANS TISSUES CELLS

  3. What are all living things made of? • All living things are made ofCELLS! (You have billions of cells inside you.) • Cells have specialized jobs, and are organized in your body. • For example, these red blood cells carry oxygen around your body in your blood.

  4. How are cells organized? ORGANISM (BODY) • Complex living things are organized into 5 levels. • Cells carry on the processes that keep us alive. Examples: Red Blood Cells Muscle Cells Skin Cells ORGAN SYSTEM ORGANS TISSUES CELLS

  5. Cells are organized into TISSUES! • A TISSUE is a group of similar cells that all do the same thing (they have the same function). Examples: Muscle Tissue (Muscles) Nervous Tissue (Nerves) Connective Tissue (Bones) TISSUES CELLS

  6. Tissues are organized into ORGANS! • An ORGAN is a structure made of different tissues. • The organ does a specific, complex job. Examples: HeartStomach Brain Lungs ORGANS TISSUES CELLS

  7. Organs are organized into ORGAN SYSTEMS! • An ORGAN SYSTEM is a group of organs that work together to perform a major job. Examples: Circulatory System Digestive System Skeletal System ORGAN SYSTEM ORGANS TISSUES CELLS

  8. Organ Systems are organized into ORGANISMS! ORGANISM (BODY) • An ORGANISM is a living thing, with organ systems that work together to keep a body alive. Examples: Human Beings ORGAN SYSTEM ORGANS TISSUES CELLS

  9. What is HOMEOSTASIS? • HOMEOSTASIS is how your body maintains an INTERNAL BALANCE. • It keeps your body STABLE in spite of changes OUTSIDE YOUR BODY. • Example: Your body keeps CONSTANT TEMPERATURE no matter what the outside temperature.

  10. How does your body maintain HOMEOSTASIS? • When you areTOO HOT, your body SWEATSto keep you cool. When you areTOO COLD, your body SHIVERS to keep you warm.

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