Warm-Up #15 10/21/11 1)Which scientist created postulates about infectious pathogens? 2)According to Koch, if someone is sick they should have_____ in them. 3)What is a disease? 4)What is pasteurization?

Essential Question: Why is it important cells for to communicate?

Cell Specialization & Levels of Organization Unit 3 Cytology

Notes  You have 10 minutes to fill in the boxes on the bottom of your notes. Use page 76 and your vocab list. Be sure to leave some room in each box to add information. WRITE SMALL

Examples of Specialized Cells  Red Blood Cells  carry oxygen  White Blood Cells  fight intruders like bacteria and viruses  Leaf Cells  photosynthesis  Plant Stem Cells  phloem and xylem tubes to transport fluids up and down

 Specialization:  Organism is multicellular  Cells develop differently  Cells look differently  Cells do different jobs  Cells communicate and cooperate.  Organism lives!

You have a box for each of the next five slides! Start with box #1 and go counter clockwise

Levels of Organization  Level One: Cells  The basic unit of all living things

Levels of Organization  Level Two: Tissue  A group of similar cells that perform a particular function  4 animal tissues:  Muscle  Epithelial  Nervous  Connective

Levels of Organization  Level Three: Organs  A group of tissues that work together to complete a more complicated job.  Examples:  Heart  Liver  Ovaries  Eyes

Levels of Organization  Level Four: Organ Systems  A group of organs that can complete a series of tasks  Examples:  Nervous  Digestive  Reproductive  Circulatory

Organisms  Cells communicate and cooperate so the organism can live  Ex: Nerve cells tell muscle cells to move and animal catches dinner!

Exotic Animals  preserve-owner-suicide-animals- loose/story?id=