Topic 1: Levels of Organization

Question 1

What are the 6 levels of organization, from simple to complex?

Answer 1

1. Chemical level (basic level)
2. Cellular level
3. Tissue level
4. Organ level
5. organ system level
6. Organism

Question 2

What is the chemical level? (2)

Answer 2

• atoms (like H + O atoms)
• atoms join to form molecules (like water)

Question 3

What is the cellular level? (3)

Answer 3

• molecules form organelles, which form cells
• cells are the basic unit of structure and function
• all cells contain chemicals, but their functions may differ (rbc, neurons, muscle cells)

Question 4

What is the tissue level? (2)

Answer 4

• a group of structurally similar cells with a common function
• there are 4 major tissues

Question 5

Name the 4 major tissues

Answer 5

1. epithelium
2. Connective Tissue (CT)
3. Muscle
4. Nervous

Question 6

What type of tissue is epithelium?

Answer 6

lining type of tissue

Question 7

What type of tissue is connective tissue (CT)?

Answer 7

it bridges the gap between 2 tissues

Question 8

What type of tissue is muscle?

Answer 8

contractile tissue

Question 9

What type of tissue is nervous tissue?

Answer 9

signaling

Question 10

What is the organ level?

Answer 10

• 2 or more tissues working together for a common function

Question 11

Give an example of the organ level of organization

Answer 11

The stomach has all 4 major tissues working together to digest

Question 12

What is the organ system level?

Answer 12

• several related organs that work together to accomplish a common purpose

Question 13

Give an example of the organ system level of organization

Answer 13

• The respiratory system
• trachea, bronchi, lungs, etc. work together for respiration

Question 14

What is the organism level?

Answer 14

all systems function together to maintain life
ex. YOU