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Chapter 2

Chapter 2 . Organs in Animals and Plants. Organs. A group of tissues that work together to perform a specific function 4 main organs we will be studying Skin Lung Heart Stomach. Skin. Largest organ in the body Protects the inner cells from damage Protects against disease Insulates

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Chapter 2

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  1. Chapter 2 Organs in Animals and Plants

  2. Organs • A group of tissues that work together to perform a specific function 4 main organs we will be studying • Skin • Lung • Heart • Stomach

  3. Skin • Largest organ in the body • Protects the inner cells from damage • Protects against disease • Insulates • Excretes waste 2 main layers Epidermis Dermis

  4. Epidermis • Outer protective layer • Made up of epithelial cells • Prevents bacteria and viruses from entering the body • Helps absorb the vitamin D from the sun • Vitamin D is essential for bone development

  5. Dermis • Inner layer on the skin • Contains nerves that sense • Pain • Heat • Cold • Send info to the brain • Makes up the following: • Connective • Muscle • nervous

  6. Lungs • Pair of organs involved in breathing • Oxygen in and carbon dioxide out • Half of its mass is BLOOD • Covered in 2 sacs of connective tissue • Capillaries- thin walled blood vessels that connect arteries and veins

  7. Heart • Muscular pump that supplies all blood to the body • About the size of your fist • Beats 3.5 billion in a life • 4 chambers • Right atrium • Left atrium • Right ventricle • Left ventricle

  8. Digestion- page 58 • Esophagus • Stomach • Intestine • Small • Large Peristalsis: contraction and relaxation of the smooth muscles along the esophagus

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