Human Body Systems

Which statement best summarizes the relationship between the muscular system and the cardiovascular system?

• The skeletal system protects the lungs

• The cardiovascular system delivers oxygen for muscle energy

• The respiratory system provides oxygen for cells

• The heart contracts and expands as it pumps blood throughout the body

How does the skeletal system benefit the respiratory system?

• Protects the lungs

• Provides structure and movement for the body

• Transports nutrients to cells

• Produces red blood cells

How do the muscular and skeletal systems work together to help the body?

• The respiratory system provides oxygen for cells

• The cardiovascular system delivers oxygen for muscle energy

• The digestive system transports waste through the bloodstream

• They provide structure and movement for the body

Which two systems work together to help a person stand up?

• Nervous and digestive

• Respiratory and circulatory

• Skeletal and muscular

• Excretory and cardiovascular

Animals in the phylum Chordata possess a brain, spinal cord, and a network of nerves. Which level of organization is represented by this combination of structures?

• organ

• organism

• organ system

• tissue system

Which two systems deliver oxygen to all body cells?

• Cardiovascular and digestive

• Nervous and muscular

• Cardiovascular and respiratory

• Digestive and muscular

Answer explanation

The cardiovascular system transports oxygen-rich blood from the lungs to all body cells, while the respiratory system facilitates the exchange of oxygen and carbon dioxide in the lungs. Together, they ensure oxygen delivery.

Which system is responsible for carrying oxygen from the lungs to all cells in the body?

• Nervous

• Respiratory

• Cardiovascular

• Digestive

Answer explanation

The cardiovascular system is responsible for transporting oxygen from the lungs to all cells in the body through the blood. The nervous system controls body functions, the respiratory system facilitates gas exchange, and the digestive system processes food.

Which system carries nutrients and oxygen to cells and removes waste?

• Nervous

• Respiratory

• Cardiovascular

• Digestive

Answer explanation

The cardiovascular system is responsible for transporting nutrients and oxygen to muscle cells while also removing carbon dioxide and waste products, making it the correct choice for this function.

What does the brain tell the body to increase based on carbon dioxide levels in the blood?

• Heart rate

• Breathing rate

• Blood pressure

• Muscle movement

Answer explanation

The brain monitors carbon dioxide levels in the blood. When CO2 increases, it signals the body to increase the breathing rate to expel more CO2, thus maintaining proper gas exchange and homeostasis.

Which two systems are involved when the brain communicates with the lungs?

• Cardiovascular and muscular

• Nervous and respiratory

• Digestive and nervous

• Muscular and respiratory

Answer explanation

The brain communicates with the lungs primarily through the nervous system, which sends signals to control breathing. The respiratory system is directly involved in the process of gas exchange, making 'Nervous and respiratory' the correct choice.