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Atoms to organisms

http://newport.pmel.noaa.gov/whales/images/blublowphoto-bl.jpg

Atoms• Smallest units of an element• Examples include hydrogen, carbon, nitrogen, oxygen• About 1/100,000,000 of a centimeter

http://www.cc.gatech.edu/scivis/research/atom/atom.gif

Individual gold atoms are pulledoff of a surface onto a sharpnickel point.

Molecules• Groups of atoms covalently bonded• Smallest unit of a substance• Examples include water H2O, oxygen

(O2), carbon dioxide (CO2)

http://www.apple.com/education/hed/macsinaction/brooklyn/images/watermol.gif

Macromolecules• Large molecules made up of many subunits• Examples include DNA, cellulose and proteins

The image is of titin, the largestknown single peptide protein. It isabout 1/10,000 cm long and helpsmuscles develop and hold together.

http://www.leeds.ac.uk/bms/cell-motility.com/tifs/titin.gif

Organelles• Groups of macromolecules organized into a functional unit• Analogous to organs in our bodies• Examples include mitochondria, chloroplasts and

ribosomes

http://tidepool.st.usm.edu/pix/nucleus.gif

Nematocysts (don’t write this down)

• Largest known organelles• Stinging cells of cnidarians (corals, jellies)

http://www.jcu.edu.au/interest/stingers/neamtocysts%20with%20droplets.jpg

Spent nematocysts ofa box jelly with venomcoming out the tips.

http://www.calacademy.org/research/izg/Cnidocyte%20and%20Nematocyst.jpg

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Cells• The basic unit of living things• Cells come from other cells• Cells are about 1/1,000 cm.• Examples include skin cells, blood cells,

nerve cells, etc.

http://cti.itc.virginia.edu/~psyc220/golgi1.gif

Brain cell

http://www.nigms.nih.gov/news/science_ed/images2/whatart2.jpg

Cork cells

More Cells

http://www.ldeo.columbia.edu/dees/ees/life/slides/paramecium.gif

http://www.addu.edu.ph/college/rstc/gallery/image/ms1.jpg

Red blood cellsfrom a rabbit

Onionroot cells

Paramecium (a pond waterorganism)

http://www.people.virginia.edu/~zs9q/zsfig/cell1.jpg

Tissue

http://www.ucd.ie/vetanat/calnet/muscle/image/cardiac2.jpg

Heart muscle

http://asb.aecom.yu.edu/histology/labs/images/slides/A76_ThickSkin_4X.jpg

Human skin

• A group of similar cells that perform acommon function

• Examples include muscle tissue, nervetissue, connective tissue, glandular tissue

Organs• A collection of tissues that perform a common function• Examples include heart, lungs, stomach, brain and skin

http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/9828.jpg

Organ System• A group of organs that perform a common function• Examples include digestive system, integumentary

system, respiratory system and musculoskeletal system.

http://biology.clc.uc.edu/graphics/bio105/skeleton.jpg

Organism• A complete individual or form of life• Examples include us, plants, fungi, bacteria

http://www.auduboninstitute.org/ani/desktops/1024/peacock.jpg