Cell Size, and Cell Specialization

Chap 7-1 & 7-4

http://www.parlament-berlin.de/Galeriecopy.nsf/0/8ABC720262898739C1256A480037F869?OpenDocumenhttp://www.ncu.edu.tw/~ls/graph/faculty_pictures/whole_time/SLC/SLC_lab-1.jpgt

All living things made of cells BUT… organisms can be very different.

UNICELLULARMULTICELLULAR

Image from: http://www.agen.ufl.edu/~chyn/age2062/lect/lect_06/bacsiz.GIF

http://www.angelbabygifts.com/http://www.inclusive.co.uk/downloads/images/pics2/tree.gif

CELL SIZE

Typical cells range from: 5 – 50 micrometers (microns) in diameter

http://facstaff.bloomu.edu/gdavis/links%20100.htm

How big is a micron ( µ ) ?http://www.talentteacher.com/pics/005cb.jpg

1 cm = 10,000 microns 1” = 25,000 microns

MULTICELLULAR ORGANISM don’t just contain MANY CELLS.

Image from: http://www.isscr.org/images/ES-cell-Fig-2.jpg

They have different kinds of cells doing different jobs

Cells in a multi-cellular organism become SPECIALIZED by turning different genes on and off Image from: http://www.ncu.edu.tw/~ls/graph/faculty_pictures/whole_time/SLC/SLC_lab-1.jpg

Cell Specialization =DIFFERENTIATION

SPECIALIZED ANIMAL CELLSMuscle

cells Red blood cells

http://www.biologycorner.com/bio3/images/bloodcells3D.jpg

http://www.mlms.logan.k12.ut.us/~ajohnson/Cells.html

Cheek cells

Specialized Plant cells

Guard cellsXylem cells

Pollen

Guard cells: http://botit.botany.wisc.edu/courses/img/Botany_130/Diversity/Bryophytes/Anthoceros/Guard_cells.jpgXylem: http://botit.botany.wisc.edu/images/130/Secondary_Growth/Woody_Stems/Tilia_Stem/Secondary_Growth/One_Year_Stem/Primary_xylem_MC.jpgPollen: http://www.uic.edu/classes/bios/bios100/labs/pollen.jpg

________ __________ ___________ATOMS MOLECULES ORGANELLES

IMAGE SOURCES: see last slide

____________ ____________ CELLS TISSUES

IMAGE SOURCES: see last slide

Similar cells working together

___________ __________ ___________ORGANSORGAN SYSTEMS ORGANISM

IMAGE SOURCES: see last slide

Different tissuesworking together

Different organsworking together