Transcript Cells
What are cells? What are cells? Building blocks of living things Let’s name some living things: people, plants, animals, bacteria Cells provide structure, convert nutrients to energy, and carry out specialized functions. Your body is made of trillions of cells. Muscle cells help you move, stomach cells help you digest your lunch, and skin cells cover your whole body! Cell Structure What do cells look like? Animal cells Plant cells http://www.glogster.com/amsgirl/shrock1-plant-animal-cell/g-6lunn7f8fjsc4kg7g50nsa0 Cell Structure What do cells look like? Animal cells Plant cells • Let’s make our own cell models! http://www.oncoursesystems.com/school/webpage/10845583/7883070 Video Making animal cell and plant cell models https://www.youtube.com/watch?v=IDX9JOUskuA Transport How can stuff get in and out of cells? Passive Oxygen, carbon dioxide and water pass through tiny holes in the cell membrane from high concentration to lower concentration Called diffusion for gases, or osmosis for water Let’s explore diffusion! http://www.biology4kids.com/files/cell2_passivetran.html Video Diffusion through a cell membrane Remember, an egg is a really big single cell! https://www.youtube.com/watch?v=rFls3g8v6fo Transport How can stuff get in and out of cells? Active Larger molecules need help to pass through the cell membrane They can move one molecule at a time, or in bigger chunks Requires energy http://www.biology4kids.com/files/cell2_activetran.html http://www.sophia.org/concepts/endocytosis- Movement How can cells move? Some crawl (video 1 video 2) make new attachments at the front release attachments from the back contract cell body to bring cell forward Let’s explore how cells move by playing with toy water snakes! https://www.youtube.com/watch?v=JnlULOjUhSQ http://www.microscopyu.com/moviegallery/livecellim Video How can cells move? Some swim (video 1 video 2) Cilia or flagella on cell body move back and forth or around like a propeller to produce movement Can you think of other ways cells might move? https://www.youtube.com/watch?v=HXcEACQv5-8 https://www.youtube.com/watch?v=jl0TzaWUQWk Video Can you think of things other than cells that move in similar ways? Let’s cell-ebrate what we’ve learned! We know… the parts of the cell how water and other materials move in and out of cells how cells move