1. Cell Organelles

2. Internal Organization
Organelles: parts of a cell, have specific jobs
Tissues: groups of cells that have a similar function

3. Skin Cells

4. Death of Tissue

5. Organ Systems
Organ systems- a group of organs that work together to perform a set of related tasks. Digestive system includes: the stomach, esophagus, intestines and mouth.
Cells→Tissues→Organs→Organ Systems

6. Human Circulatory System

7. Cell Organelles!
Cell Membrane – separates cell from external environment, gives shape and flexibility to cell, selectively permeable

8. Continue… Cytoplasm: gelatin like aqueous fluid called cytosol
Cytoplasmic streaming
Mostly water but also salts and organic molecules

9. Continue…
Mitochondia: power house of the cell! Where cellular respiration occurs, production of ATP, has it’s own DNA
Cristae: inner membrane creating many folds to increase surface area

10. Continue… Ribosomes: where proteins are made,
Free Floating Ribosome: make proteins for the cell
Ribosomes attached to ER: make proteins to be exported from the cell

11. Continue…
Endoplasmic Reticulum: (ER) acts as a highway for molecules to move around the cell.
Smooth ER: does NOT contain ribosomes; cell detox;
manufactures lipids; stores calcium ions
Rough ER: does contain ribosomes; sites of protein synthesis;

12. Continue… Golgi Apparatus (bodies) processes, packages, and secretes
a) product is assembled (moves from ER to golgi, where it is put together and adjusted)
b) product is packaged (in new sacs)
c) product is mailed out (sent out of cell)

13. Continue….
Cilia: short hair like projections beat together to move an organism ex: humans trachea cilia move fluids and mucus! YUM

14. Continue…
Flagella: long, whiplike projections, single or in pairs, rapid movement, ex: sperm

15. Continue….
Nucleus: brains! Control center of cell, DNA & RNA are made here!
Nuclear envolope: double membrane with pores
Chromatin: fine strands of DNA & protein
Nucleolus: inside nucleus where ribosomes are made

16. Continue…
Lysosome: digestive enzymes, digest food, disease causing bacteria, old organelles, ex: lysosomes eat up tissue between fingers in embryos, usually only in animal cells

17. Continue… Cytoskeleton- helps shape & support cells
Microtubules: long slender protein tubes form spindle fibers during mitosis
Microfilaments: fine protein threads

18. Animal cell only! Centrioles: cell reproduction
Centrosome: cell reproduction

19. Animal Cell