Circulatory system

• What is the circulatory system also known as?


  Cardiovascular system
• What is the primary function of the circulatory system?

  To transport blood, oxygen, nutrients, hormones, and waste products throughout the body
• What type of system is the circulatory system in humans and other vertebrates?

  Closed system
• What are the three main components of the circulatory system?

  Heart, blood vessels, and blood
• How does the circulatory system work with the respiratory system?

  It delivers oxygen and removes carbon dioxide
• What is the function of the heart in the circulatory system?

  To pump blood throughout the body
• What are the four chambers of the heart?

  Two atria and two ventricles
• What is the largest artery in the body?

  Aorta
• What is the primary role of capillaries in the circulatory system?

  To allow exchange of substances between blood and tissues
• What percentage of body weight does blood make up?

  7-8%
• What are the main components of blood?

  Plasma, red blood cells, white blood cells, and platelets
• What is the function of red blood cells?

  To carry oxygen throughout the body
• What is the role of platelets in the blood?

  Essential for blood clotting
• What is pulmonary circulation?


  The flow of blood between the heart and lungs
• What happens to deoxygenated blood in the lungs during pulmonary circulation?

  It releases carbon dioxide and picks up oxygen
• What is systemic circulation?

  The flow of blood between the heart and the rest of the body
• What is the primary purpose of the circulatory process?

  To ensure efficient circulation and maintain bodily functions
• How do arteries differ from veins in terms of structure and function?

  Arteries carry blood away from the heart and have thick, elastic walls, while veins return blood to the heart and have thinner walls with valves
• What is the function of the left ventricle?

  To pump oxygenated blood to the rest of the body
• What is the role of the right atrium?

  To receive deoxygenated blood from the body
• What is the role of the left atrium?

  To receive oxygenated blood from the lungs
• What is the role of the right ventricle?

  To pump deoxygenated blood to the lungs
• What is the significance of valves in veins?

  They prevent backflow of blood as it returns to the heart
• What is the primary component of plasma?

  Water (90%)
• What is the function of white blood cells?

  To defend the body against infections and foreign substances
• What is the role of hemoglobin in red blood cells?

  To bind to oxygen and transport it throughout the body
• How does the circulatory system maintain homeostasis?

  By regulating blood flow and transporting essential substances
• What is the significance of the aorta in the circulatory system?

  It is the largest artery that carries oxygenated blood from the heart to the body
• What is the role of capillaries in nutrient exchange?

  They allow for the exchange of gases, nutrients, and waste between blood and tissues
• What happens during the cardiac cycle?

  The heart undergoes a series of coordinated contractions and relaxations to pump blood
• How does the heart maintain blood pressure?

  By pumping blood with sufficient force through the circulatory system
• What is the function of the pulmonary veins?

  To carry oxygenated blood from the lungs to the left atrium
• What is the function of the venae cavae?

  To return deoxygenated blood to the right atrium
• What is the significance of the cardiac cycle in the circulatory system?

  It ensures continuous blood flow and proper functioning of the heart
• How does the circulatory system interact with other body systems?

  It supports all other body systems by delivering essential substances and removing waste
• What is the role of the heart valves?

  To ensure one-way blood flow through the heart
• What is the importance of maintaining homeostasis in the circulatory system?

  It ensures stable internal conditions necessary for optimal functioning of the body
• What is the relationship between blood pressure and blood flow?

  Higher blood pressure facilitates greater blood flow through the circulatory system
• How does the body respond to increased physical activity in terms of the circulatory system?

  The heart rate increases to pump more blood and deliver oxygen to muscles
• What is the role of the circulatory system in thermoregulation?

  It helps regulate body temperature by adjusting blood flow to the skin