Levels of Organization

What is the smallest unit of life in the human body?

• Tissues

• Organs

• Organ systems

• Cells

Which type of tissue lines the inside of the mouth and helps protect it from wear and tear?

• Epithelial tissue

• Connective tissue

• Nervous tissue

• Muscle tissue

What is the function of the respiratory system in the human body?

• Excretion

• Respiration

• Circulation

• Digestion

Which organ is responsible for the gas exchange of oxygen and carbon dioxide in the body?

• Heart

• Lungs

• Kidneys

• Liver

What is the role of the diaphragm in the respiratory system?

• Filtering waste

• Producing hormones

• Expanding and contracting the lungs

• Pumping blood

What is the next level of organization after cells in the human body?

• Tissues

• Organs

• Organ systems

• Blood vessels

Which type of tissue is responsible for the contraction and movement of the body?

• Epithelial tissue

• Connective tissue

• Muscle tissue

• Nervous tissue

What is the function of the organ system in the human body?

• To regulate body temperature

• To produce energy for the body

• To protect the body from external threats

• To carry out complex functions for the body

What is the hierarchical organization of the human body made up of?

• Random layers

• Parallel layers

• Nested layers

• Concentric layers

Which level of organization is made up of a collection of similar, specialized cells?

• Blood vessels

• Tissues

• Organ systems

• Organs