Leaving Cert Biology 2.4 Cell Diversity Cell Diversity Skin cell Bone cell Hair cell Leaving Cert Biology 2.4 Cell Diversity All living things are made of cells. From cell to organism animal plant Leaving Cert Biology 2.4 Cell Diversity SPECIALISED CELLS CAN YOU GUESS WHAT EACH OF THE FOLLOWING CELLS ARE CALLED? Leaving Cert Biology 2.4 Cell Diversity 1. Hint : it carries oxygen Leaving Cert Biology 2.4 Cell Diversity 2. Hint : it is found in plants under the ground Leaving Cert Biology 2.4 Cell Diversity 3. Hint : This cell stops us being sick Leaving Cert Biology 2.4 Cell Diversity 4. Hint : This cell is needed to make new humans. Leaving Cert Biology 2.4 Cell Diversity 5. Hint : This cell grows lots in 9 months. Leaving Cert Biology 2.4 Cell Diversity 6. HINT: Carries messages around the body. Leaving Cert Biology 2.4 Cell Diversity 7. HINT: carries water around plants. Leaving Cert Biology 2.4 Cell Diversity Whose cell is it anyway? Leaving Cert Biology 2.4 Cell Diversity Tissues are groups of cells with similar structures and functions Tissues cells tissue Leaving Cert Biology 2.4 Cell Diversity Animal tissuesPlant tissues muscle bone liver skin lung mesophyll phloem xylem Can you think of any more types of tissue? Examples of tissue Leaving Cert Biology 2.4 Cell Diversity Examples of animal tissues Epithelial tissue Made of cells that cover inner and outer surfaces and protect them. Nervous tissue Made of nerve cells that carry electrical impulses signals around the body. Leaving Cert Biology 2.4 Cell Diversity Examples of plant tissues Dermal tissue Made of cells that that protect the surfaces of the plant. Vascular Tissue Made of cells that transport water, minerals and sugar through the plant. Leaving Cert Biology 2.4 Cell Diversity Tissue Cultures Def Tissue culture is the growth of tissues outside an organism using a sterile nutrient fluid Tissue cultures can be used to make plants for horticultural use! Leaving Cert Biology 2.4 Cell Diversity Tissue Cultures Tissue cultures can also be used to grow replacement cells to repair damaged issues in humans ! Muscle tissue Pancreas tissue Nervous tissue Leaving Cert Biology 2.4 Cell Diversity Discuss some advantages and some disadvantages of this type of tissue culturing.. Leaving Cert Biology 2.4 Cell Diversity What did you learn today? What is a tissue? Name 2 examples of animal tissues Name 2 examples of plant tissue What is a tissue culture? Give some uses of tissue cultures Leaving Cert Biology 2.4 Cell Diversity Groups of tissues work together to form organs. Organs cell tissueorgan Leaving Cert Biology 2.4 Cell Diversity Organs Def An organ is a group of tissues that work together to carry out a particular function. The hearts function is to pump blood around the body Example of an animal organ : The heart Leaving Cert Biology 2.4 Cell Diversity Organs The function of the leaf organ is photosynthesis Example of a plant organ : The leaf Leaving Cert Biology 2.4 Cell Diversity The leaf a plant organ Leaving Cert Biology 2.4 Cell Diversity Which organ? Leaving Cert Biology 2.4 Cell Diversity Which organ? Leaving Cert Biology 2.4 Cell Diversity Which organ? Leaving Cert Biology 2.4 Cell Diversity Groups of organs form systems. How is the body organized? Leaving Cert Biology 2.4 Cell Diversity Organ systems Def an organ system is a group of organs working together to carry out a particular function Example of an animal organ system: The circulatory system The circulatory system functions to transport materials around the body and to fight infection. Leaving Cert Biology 2.4 Cell Diversity Second example of an animal organ system : The digestive system The digestive system functions to take in food, break it down and transport it into the circulatory system. Leaving Cert Biology 2.4 Cell Diversity Matching systems and organs Leaving Cert Biology 2.4 Cell Diversity 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. Being organized means that the body does not waste energy, so it is more efficient. grow reproduce respond to things excrete respire movedigest food body life processes Leaving Cert Biology 2.4 Cell Diversity Anagrams Leaving Cert Biology 2.4 Cell Diversity Cells summary Leaving Cert Biology 2.4 Cell Diversity Multiple-choice quiz