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The heart contains different types of tissue. What level of organization is the heart?

• cell
• organ system
• organ
• tissue

Which of the following shows the levels of organization in order from simple to complex?

• 1. Cell

  2. Tissue

  3. Organ

  4. Organ System

  5. Organism

• 1. Cell

  2. Tissue

  3. Organelle

  4. Organ

  5. Organ System

• 1. Tissue

  2. Organelle

  3. Cell

  4. Organ

  5. Organism

• 1. Organ

  2. Tissue

  3. Cell

  4. Organism

  5. Organ System

Cells combine to form...

• tissue

• organs

• organ systems

• organisms

Tissues combine to form...

• cells

• organs

• organ systems

• organelles

Organs combine to form...

• organ systems

• organs

• tissues

• organisms

Organ systems combine to form...

• cells

• tissues

• organs

• organisms

Which level of organization is the smallest and simplest?

• Cell

• Tissue

• Organ

• Organ System

• Organisms

Which level of organization is the largest and most complex?

• Cell

• Tissue

• Organ

• Organ System

• Organism

Which of the following is considered the smallest unit of life?

• Atom

• Cell

• Organelle

• Molecule

Organs that work together are part of a(n) ________________________.

• cells

• tissue

• organ system