Cell Theory

1. all animal tissues are composed of cells and collaborated with Schleiden for cell theory in 1839
4. developed microscope lens in 1670 to observe more closely, observed bacteria and protozoa, described red blood cells
6. obtaining food to provide energy for growth.
10. discovered that all cells are created by the division of previous cells in 1855
11. cells perceive and respond to changes in their environment.
12. declared plants are made of cells and cells are the building blocks of plant life in 1838
13. cells carry out a variety of chemical reactions to break down nutrients, synthesize molecules, and eliminate waste products.
14. protection against enemies
16. smallest structural and functional unit of an organism. Contains cytoplasm enclosed within a membrane.

2. the theory that states all organisms made of cells, cells are basic unit of life, all cells result from division of other cells
3. cells increase in size, divide through mitosis, allowing for growth and development of an organism
5. keeping conditions inside the organism with tolerable limits (balanced)
7. cells replace themselves through cell division, ensuring the continuation of life.
8. cell without a nucleus
9. discovered cells in 1665 by observing cork trees under a microscope and said they looked like little rooms.
15. cell containing a nucleus