1. The Cell is the Basic Unit of Life
The Cell is the smallest living organism
Unicellular organisms are made of one cell only
The cells of multicellular organisms are specialized to perform different functions 1 1

2. Different kinds of animal cells
white blood cell
red blood cell
cheek cells
sperm
nerve cell
muscle cell
Amoeba
Paramecium 2 2

3. Different kinds of plant cells
Onion Epidermal Cells
Root Hair Cell
root hair
Guard Cells 3 3

4. Levels of organization
Cells are grouped together and work as a whole to perform special functions 4 4

5. Cell A living organism which performs ALL of the life processes
Cells are the smallest unit of all living organisms 5 5

6. Two Main Types of Eukaryotic Cells
Animal Cell
Plant Cell 6 6

7. Prokaryotes “Nucleoid” region contains the DNA
Cell membrane & cytoplasm
Bacteria 7 7

8. Organization… Cells – to – Tissues – to – Organs – to –
Organ Systems – to –
Organisms! 8 8

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Tissue
A group of similar cells which perform a particular function
Animals : epithelial (skin) tissue, muscular tissue
Plants : vascular tissue, mesophyll
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10. Organ
Different tissues work together to carry out specialized functions
Heart : consists of muscles, nervous tissue and blood vessels
Leaf : consists of epidermis, mesophyll and vascular tissue 10 10

11. The Structures of a Leaf (Plant Organ)
Chloroplast
Palisade Mesophyll Cell
Spongy Mesophyll Cell
Air Space
Stoma
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12. The Structures of a Heart (Animal Organ)12

13. System
Several organs and tissues work together to carry out a particular function
Human: digestive, respiratory, excretory, circulatory and reproductive systems
Plant: root and shoot systems 13

14. Human Body Systems Examples of systems: - Digestive System
- Respiratory System
- Circulatory System
- Nervous System
- Reproductive System 14

15. Levels of Organization
CELLS (muscle cells,nerve cells)
TISSUES (muscle, epithelium)
ORGANS (heart, lungs, stomach)
SYSTEMS (circulatory system)
ORGANISM (human) 15

16. It’s You! 16