Knowledge Check wk 12: Circulatory and Respiratory Systems

What is the main function of the respiratory system?

• To transport oxygen to tissues
• To exchange oxygen and carbon dioxide
• To eliminate waste
• To regulate hormones

Which system plays a vital role in maintaining homeostasis by transporting nutrients and removing waste?

• Circulatory system
• Respiratory system
• Digestive system
• Excretory system

The primary function of the respiratory system is to exchange oxygen and carbon dioxide.

• True
• False

__________ carry oxygenated blood away from the heart to the body's tissues.

• Veins
• Capillaries
• Arteries
• Vena cava

The main function of the respiratory system is to exchange __________ and carbon dioxide.

• Oxygen
• Nitrogen
• Hydrogen
• Carbon monoxide

The __________ is a key organ in the circulatory system, pumping blood throughout the body.

• Liver
• Heart
• Kidney
• Lung

Which system is responsible for transporting oxygen from the lungs to the body's cells?

• Digestive system
• Respiratory system
• Circulatory system
• Nervous system

What is the main, muscular organ that pumps blood throughout the circulatory system?

What is the primary function of the circulatory system?

• to both mechanically and chemically break down food into nutrients
• to send messages to the body
• to transport oxygen, nutrients and waste throughout the body
• to move the body
• to bring in oxygen from outside the body and release carbon dioxide

Which component of blood is primarily responsible for carrying oxygen?

• White blood cells
• Plasma
• Red blood cells
• Platelets