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Human Organ Systems (Lesson 2)


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Human Organ Systems (Lesson 2)

  1. 1. Human Systems -Like plants, animals have different parts or organs to carry out different jobs. -Organs allow animals to detect and respond to changes around them. -An organ is a part of a living body that performs certain important functions. - Examples of organs are : eyes, nose, ears, tongue, skin
  2. 2. Organs of a Human The organs in our body form systems to allow life processes like movement and reproduction. Our body has various organ systems. Each system performs its own function but they all work together to keep us alive. Examples of human organ systems 
  3. 3. Human Organ Systems Muscular Circulatory System System Carries Enables food, water movement and waste materials to & from various parts of the body.
  4. 4. Human Organ Systems Skeletal Digestive System System Supports Breaks down the body food into and keeps simpler it in substances shape. for the body to absorb.
  5. 5. Human Organ Systems Respiratory System For breathing- To take in oxygen needed by the body and give out unwanted carbon dioxide from the body to the air.
  6. 6. Digestive System -The food we eat must be broken down into simpler substances known as nutrients. -The process of breaking down food into simpler substances is called digestion. -Digestion is carried out by our digestive system. It is a complex process and involves more than one organ.
  7. 7. A journey through our digestive system!  Mouth Gullet Anus (Oesophagus) Stomach Rectum Small Large intestines intestines
  8. 8. Skeletal System -The bones in our body connect and form the skeleton. - Our skeleton gives our body shape, supports our body and protects important organs in our body. -The backbone supports our body. -The ribcage protects our lungs and heart. -The skull protects our brain and eyes.
  9. 9. Skeletal System
  10. 10. Skeletal System The place where 2 or more bones are connected is called a joint. Can you name some joints? 
  11. 11. Muscular System - Our bones can move at the joints, but they cannot move by themselves. - Bones need muscles to move them. -There are many muscles in our body. The muscles lie underneath our skin and cover our skeleton. -Muscles are also found in organs such as our heart and gullet (also known as??)
  12. 12. Muscular System -Muscles can become shorter, or contract. -They can also become longer and soft. That is their relaxed position. -D.I.Y. : What happens when you straighten/ bend your arm?
  13. 13. Muscular System Muscles enable our body to move by contracting and relaxing. Our muscles and skeleton work together to help us move. This proves that 2 or more systems can work together to perform a function.