2. LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON TO GO BACK, PRESS ESC BUTTON TO END LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON TO GO BACK, PRESS ESC BUTTON TO END COMPUTER PRESENTATIONS FOR KS3 SCIENCE - BIOLOGY ©2003, STEVE PARKER COMPUTER PRESENTATIONS FOR KS3 SCIENCE - BIOLOGY ©2003, STEVE PARKER

3. 1 1 KS3 SCIENCE - BIOLOGY KS3 SCIENCE - BIOLOGY Human Organ Systems Human Organ Systems

4. SPECIALISED CELLS 2 2

5. Specialised Cells Tissues SPECIALISED CELLS 3 3Organs There is a hierarchy of body parts There is a hierarchy of body parts Organism

6. SPECIALISED CELLS 4 4 Cells are designed to do a particular job Cells are designed to do a particular job Sperm cells contain half the genetic material for making a new person, and have a tail so they can swim towards the egg Sperm cells contain half the genetic material for making a new person, and have a tail so they can swim towards the egg

7. SPECIALISED CELLS 5 5 Cells are designed to do a particular job Cells are designed to do a particular job Egg cells contain half the genetic material for making a new person, and have Yolk to provide food for growth Egg cells contain half the genetic material for making a new person, and have Yolk to provide food for growth

8. SPECIALISED CELLS 6 6 Cells are designed to do a particular job Cells are designed to do a particular job Ciliated cells line the air passages, and sweep Mucus up the throat - dust is trapped in mucus and removed Ciliated cells line the air passages, and sweep Mucus up the throat - dust is trapped in mucus and removed

9. SPECIALISED CELLS 7 7 Cells are designed to do a particular job Cells are designed to do a particular job Red Blood Cells are biconcave discs with no Nucleus - their job is to carry oxygen around the body Red Blood Cells are biconcave discs with no Nucleus - their job is to carry oxygen around the body

10. SPECIALISED CELLS 8 8 Cells are designed to do a particular job Cells are designed to do a particular job Nerve Cells are shaped like wires Nerve Cells are shaped like wires

11. SPECIALISED CELLS 9 9 Cells are designed to do a particular job Cells are designed to do a particular job This enables them to carry impulses around the body This enables them to carry impulses around the body

12. MAJOR SYSTEMS 10

13. MAJOR SYSTEMS 11 There are 206 Bones in the human body There are 206 Bones in the human body Their main functions are to support the body and to protect Organs Their main functions are to support the body and to protect Organs The Skeletal System System

14. MAJOR SYSTEMS 12 Muscles are attached to bones, usually in pairs Muscles are attached to bones, usually in pairs They contract and relax to move us They contract and relax to move us The Muscle System System

15. MAJOR SYSTEMS 13 Oxygen from air in the Lungs is absorbed into the Blood Oxygen from air in the Lungs is absorbed into the Blood Waste carbon dioxide is sent back out Waste carbon dioxide is sent back out The Respiratory System System

16. MAJOR SYSTEMS 14 Digestion breaks down food so it can be absorbed by the body Digestion breaks down food so it can be absorbed by the body Undigested food and waste go through the system and come out Undigested food and waste go through the system and come out The Digestive System System

17. MAJOR SYSTEMS 15 The Heart pumps blood around the body to distribute oxygen and food The Heart pumps blood around the body to distribute oxygen and food Waste products are taken away Waste products are taken away The Circulatory System System

18. MAJOR SYSTEMS 16 Males produce Sperm, females produce Eggs Males produce Sperm, females produce Eggs These come together to make offspring These come together to make offspring The Reproductive System System

19. MAJOR SYSTEMS 17 There are five sense organs - eyes, ears, nose, tongue, skin There are five sense organs - eyes, ears, nose, tongue, skin Nerves send impulses to the brain from sense organs and impulses to control muscles Nerves send impulses to the brain from sense organs and impulses to control muscles The Nervous System System

20. MAJOR SYSTEMS 18 The Kidneys filter and clean the blood to get rid of waste and poisons The Kidneys filter and clean the blood to get rid of waste and poisons Waste is turned into Urine and stored in the Bladder Waste is turned into Urine and stored in the Bladder The Excretory System System

21. MAJOR SYSTEMS 19 Hormones to control the body are produced in various Glands Hormones to control the body are produced in various Glands These include Pituitary, Thyroid, Pancreas and Adrenal Glands These include Pituitary, Thyroid, Pancreas and Adrenal Glands The Endocrine System System

22. Endocrine Excretory Nervous Reproductive MAJOR SYSTEMS 20 Circulatory Digestive Respiratory Muscle Skeletal Human Being