Cells, tissues, organs and systems

1. Cells, tissues, organs and systems Saturday, 04 January 2020 Learning objectives: • To order structures to show how living organisms are organised in terms of cells, tissues, organs and systems.

2. A cell living on its own is called unicellular • Many cells together in an organism is called multicellular

3. 7E – Chicken leg dissection Tues 18th

4. Starter (5 mins) • Brick wall house street town • Discuss in pairs how these words relate to one another. • Read through the information on Student’s Book page 13 and discuss how this 'town model' is similar to a living organism.

5. How is the body organised? Living things are made up of organised systems. Each specific cell is grouped with cells similar in structure and function to form atissue. cells tissue

6. How is the body organized? Living things are made up of organized systems too. Each specific cell is grouped with other cells similar in structure and function to formtissues and ultimately organs: Cells are the basic units of life. Groups of cells work together to form tissues. Groups of tissues work together to form organs. cell tissue organ

7. Tissues • Animal cells and plant cells can form tissues. • A living tissue is made from a group of cells with a similar structure and function, which all work together to do a particular job. Here are some examples of tissues: • muscle • the lining of the intestine • the lining of the lungs

8. Examples of tissue Animal tissues Plant tissues muscle bone liver skin lung mesophyll phloem xylem Can you think of any more types of tissue?

10. How is the body like a school? To understand how the body is organized, think about all the different people that work in a school to make it function. • teachers and teaching assistants • caretakers and cleaners • dinner ladies and bus drivers • governors and office workers Everybody in the school needs to know where they should be and what they are doing for the school to function properly. Everybody does a different job – they have different skills and equipment to help them do their job.

11. What is a system?

12. Why be organized? Why do organisms have to be so organized? Organization of the body allows complex organisms to carry out many different jobs at the same time. movement body life processes nutrition respiration excretion sensitivity growth reproduction Being organized means that the body does not waste energy, so it is more efficient.

13. cell pupil tissue registration group organ subject class organ system year organism school How is the body organised? The body is made up of different organ systems working together to carry out all the functions of a living organism. Both the body and schools are organized systems:

14. 1.3b Heart and lung tissue Heart tissue fat blood muscle tissue nerve tissue

15. 1.3b Heart and lung tissue Lung tissue epithelium tissue muscle tissue

16. Gland cell Stomach lining Stomach Digestive system Big cat Cardiac muscle cell Muscle Heart Circulatory Human • Root hair cell • Root tissue • Root • Transport system • Rose bush Nerve Neurone Brain Nervous system Human

17. Linking together 1 Copy and complete these sentences using words from the box below. Groups of similar _________ working together form tissues. _________ are groups of similar tissues that work together. Some examples of organs are the heart, the _________, the stomach and the _________. Organ _________ are groups of organs that work together to perform a _________ function. Some examples of organ systems are the _________ system, the nervous system and the _________ system. brain cells circulatory lungs organs skeletal specific systems

18. Linking together 1 Copy and complete these sentences using words from the box below. Groups of similar _________ working together form tissues. _________ are groups of similar tissues that work together. Some examples of organs are the heart, the _________, the stomach and the _________. Organ _________ are groups of organs that work together to perform a _________ function. Some examples of organ systems are the _________ system, the nervous system and the _________ system. brain cells circulatory lungs organs skeletal specific systems

19. Main 50 mins • Look at keywords – do you all undertand meanings? • Students complete the questions on page 13 of the Student’s Book. • Students then work in pairs to complete the activity on Worksheet Lesson 6: Cells, tissues, organs and systems. They organise the cards first into examples of cells, tissues, organs, organ systems and organisms. They then use the cards to order groups of five to show the progression from cell to organism. • Ask pairs for feedback on how they ordered the cards and check understanding. Choose one example, such as neurone (cell), nerve (tissue), brain (organ), nervous system (organ system) and draw a 'pyramid of numbers’ style diagram to illustrate how the numbers at each level decrease.

20. All mixed up! Can you solve these key word anagrams? 1. ceillnu 2. ceilllmtu 3. celnsuu 4. abeemmnr 5. ghilt cceimooprs 6. eisstu

21. How did you do? 1. ceillnu = unicell 2. ceilllmtu = multicell 3. celnsuu = nucleus 4. abeemmnr = membrane 5. ghilt cceimooprs = light microscope 6. eisstu = tissue cell cell wall chloroplasts electron microscope food granular cytoplasm light microscope membrane multicellular organisms nucleus organ specialised cells system tissues unicellular organisms vacuole