Section 7

1

The Diversity of Cellular Life

• Section 74

2
Unicellular

• A single-celled organism is also called a(an)
  organism.

Unicellular
3
Multicellular

• What is cell specialization in a multicellular
  organism? It is the characteristic of having
• separate tasks for each type of cell.

Multicellular
4

Multicellular Organisms

• Cell specialization INCLUDES
• Specialized cells perform particular functions
  within the organism.
• The human body contains many different cell
  types.
• Some cells are specialized to enable movement.

5
LEVELS OF ORGANIZATION

• What are four levels of organization in a
  multicellular organism?
• Tissues
• Cells
• Organs
• Organ Systems

Levels of Organization
6
LEVELS OF ORGANIZATION

• What is a tissue? It is a group of similar cells
  that perform a particular function.

Levels of Organization
7
LEVELS OF ORGANIZATION

• What are the four main types of tissue in most
  animals?
• Muscle
• Epithelial
• Connective
• Nervous

8
LEVELS OF ORGANIZATION

• Groups of tissues that work together to perform a
  specific function are called a (an)
• ORGAN

9
LEVELS OF ORGANIZATION

• What kinds of tissues can be found within a
  muscle in your body?
• They include muscle tissue, nervous tissue, and
  connective tissue.

10
LEVELS OF ORGANIZATION

• What is an organ system?
• It is a group of organs that work together to
  perform a specific function.

11
CHLOROPLAST

• An organelle that uses the energy from sunlight
  to make energy-rich food molecules

12
ORGANELLE

• A structure in eukaryotic cells that acts like a
  specialized organ

13
VACUOLE

• A saclike structure in which cells store
  materials

14
CYTOSKELETON

• A network of protein filaments that helps the
  cell maintain its shape

15
EUKARYOTES

• Cells that have a nucleus

16
MITOCHONDRION

• The organelle that uses energy from food to make
  high-energy compounds

17
CELL THEORY

• A theory that states that all living things are
  composed of cells

18
OSMOSIS

• The diffusion of water through a selectively
  permeable membrane

19
ENDOCYTOSIS

• The process of taking materials into the cell by
  means of in foldings of the cell membrane

20
TISSUES

• A group of similar cells that perform a
  particular function