Cells A Characteristic of All Living Things Living

Cells A Characteristic of All Living Things Living Non-Living Family: flickr. com/photos/afroswede/327940628 ; Other images provided by Science: A Closer Look (Maryland), pages 28 and 30 (Mac. Millan/Mc. Graw-Hill, 2008) 1

Generally Accepted Characteristics of All Living Things ü They reproduce (parents and offspring) ü They grow and develop (life cycles) ü They obtain and use energy (eat or make their own food) ü They respond to their environment (move) AND ü Are made of one or more units called … CELLS 2

Cells of Multicellular Organisms Animal Cells Plant Cells Images provided by Science: A Closer Look (Maryland), pages 28 and 30 (Mac. Millan/Mc. Graw-Hill, 2008) 3

Cells ü All living things are made of cells. ü Multicellular organisms are made of different types of cells. ü Different types of cells look different and do different things. ü Specialized cells group together to form a tissue and to perform a specific function (i. e. , potato cells form potatoes and muscle cells form muscles) 4

Levels of Organization Cells: The basic building block. Tissues: Cells that work together to perform a function. Organs: Tissues that work together to perform a function. Organ System: Organs that work together to perform a function. Images provided by http: //en. wikipedia. org/wiki/Image: Illu_muscle_tissues. jpg and Science: A Closer Look (Maryland), Toolkit CD and page 30 (Mac. Millan/Mc. Graw-Hill, 2008) 5

Plant Cells Plant cells have a cell membrane and a more regular shape due to a stiff cell wall. They have chloroplasts with chlorophyll to help plants make their own food. Chloroplasts with chlorophyll Membrane Wall Images provided by Science: A Closer Look (Maryland), Toolkit CD 6 and page 30 (Mac. Millan/Mc. Graw-Hill, 2008)

Plant Cell Example Pine Needle Cells Cross Section of Pine Cells http: //upload. wikimedia. org/wikipedia/en/c/ce/ Pinus_pinea. jpg Copyright CNAP, University of York; http: //www. epobio. net/photos/cross_sec_pine. jpg 7

Plant Cell Example Potato Cells http: //upload. wikimedia. org/wikipedia /commons/c/c 8/Potato_and_cross_s ection. jpg http: //www. uleth. ca/bio 1010/bio 1010. htm 8

Plant Cell Example Onion Cells http: //upload. wikimedia. org/wikipedia/com mons/1/1 b/Onions. jpg http: //www. uleth. ca/bio 1010/bio 1010. htm 9

Plant Cell Example Elodea Cells http: //en. wikipedia. org/wiki/Image: Elodea_canad ensis 2_ies. jpg http: //www. uleth. ca/bio 1010/bio 1010. htm 10

Animal Cells The cells of humans and other animals have a cell membrane, but they do not have a stiff cell wall. They cannot make their own food and do not have chloroplasts. However, there is a greater variety to their shapes. Images provided by Science: A Closer Look (Maryland), Toolkit CD and page 28 (Mac. Millan/Mc. Graw-Hill, 2008) 11

Animal Cell Example Blood Cells Red Blood Cell White Blood Cell Red Blood Cells Platelet http: //upload. wikimedia. org/wikipedia/commons/2/24/Red_White_Blood_cells. jpg http: //upload. wikimedia. org/wikipedia/common s/e/e 6/Bleeding_finger. jpg 12

Muscle cells must stretch and grow. http: //upload. wikimedia. org/wikipedia/commons/0/0 e/Weightlifting. jpg http: //en. wikipedia. org/wiki/Muscle http: //upload. wikimedia. org/wikipedia /commons/7/74/Heart. jpg 13

Nerve cells send signals to the brain from the body. http: //upload. wikimedia. org/wikipedia/commons/b/ba/ Nervous_system_diagram. png http: //en. wikipedia. org/wiki: Smi 32 neuron http//: brainmaps. org 14

Skin (Epithelial) Cell cover the body in a thin layer. They regenerate quickly. http: //upload. wikimedia. org/wikipedia/commons/a/a 9/Chica_cachetona. jpg http: //sac. edu/Home. Pages/nigro_dan/Cheek_cell. jpg 15

Brain Cells http: //en. wikipedia. org/wiki/Image: Brain_ 090407. jpg http: //www. nih. gov/ 16

Animal or Plant Cell? http: //en. wikipedia. org/wiki/Image: Chloroplasten. jpg Plant Cell: Elodea 17

Animal or Plant Cell? http: //en. wikipedia. org/wiki/Image: GFPneuron. png Animal Cell: Nerve 18

Animal or Plant Cell? http: //upload. wikimedia. org/wikipedia/commons/1/18/Spirogyra. JPG Plant Cell: Spirogyra 19

Animal or Plant Cell? Permission granted by Rhodes EMU at http: //www 2. ru. ac. za/administrative/emu/gr 10 p 7. htm Animal Cell: Muscle 20

Animal or Plant Cell? Hedges, Kathryn. http: //pics. tech 4 learning. com Plant Cell: Potato 21

Animal or Plant Cell? Hedges, Kathryn. <http: //pics. tech 4 learning. com > Plant Cell: Onion 22

Animal or Plant Cell? http: //www. uoguelph. ca/zoology/devobio/210 labs/epithelial 1. html Animal Cell: Kidney 23

Cell Review ü All living things are made of cells. ü Multicellular organisms are made of different types of cells. ü Different types of cells look different and do different things. ü Specialized cells group together to form a tissue and to perform a specific function (i. e. , potato cells form potatoes and muscle cells form muscles) 24