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Heart, Blood Vessels, Lymphatic System, and Respiratory System

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이 집합의 용어 (20)

  • What is the primary function of the heart?

    The heart pumps blood throughout the body, delivering oxygen and nutrients and removing waste products.

  • Name the four chambers of the heart.

    The right atrium, right ventricle, left atrium, and left ventricle.

  • What type of blood does the right side of the heart receive and pump?

    The right side receives deoxygenated blood and pumps it to the lungs for oxygenation.

  • What is the function of the left side of the heart?

    The left side receives oxygenated blood from the lungs and pumps it to the rest of the body.

  • What are the three main types of blood vessels?

    Arteries, veins, and capillaries.

  • What is the primary function of arteries?

    Arteries carry oxygenated blood away from the heart to the body tissues.

  • What is the primary function of veins?

    Veins carry deoxygenated blood back to the heart.

  • What role do capillaries play in the circulatory system?

    Capillaries facilitate the exchange of oxygen, nutrients, and waste between blood and tissues.

  • What is the lymphatic system's main function?

    The lymphatic system returns excess tissue fluid to the bloodstream and helps defend against infection.

  • What are lymph nodes?

    Lymph nodes are small structures that filter lymph and house immune cells.

  • Name the primary organs of the respiratory system.

    Nose, pharynx, larynx, trachea, bronchi, lungs, and alveoli.

  • What is the main function of the respiratory system?

    To facilitate gas exchange, bringing oxygen into the body and removing carbon dioxide.

  • Where does gas exchange occur in the lungs?

    In the alveoli, tiny air sacs surrounded by capillaries.

  • What muscle is primarily responsible for breathing?

    The diaphragm contracts to allow inhalation and relaxes for exhalation.

  • How does oxygen travel from alveoli to blood?

    Oxygen diffuses across the alveolar and capillary walls into the blood.

  • What is the role of hemoglobin in blood?

    Hemoglobin binds oxygen in red blood cells for transport to tissues.

  • What prevents backflow of blood in veins?

    Valves within veins prevent backflow and ensure one-way blood flow to the heart.

  • What is systole in the cardiac cycle?

    Systole is the phase when the heart contracts to pump blood out.

  • What is diastole in the cardiac cycle?

    Diastole is the phase when the heart relaxes and fills with blood.

  • How does the lymphatic system contribute to immunity?

    It transports lymph containing immune cells that detect and fight pathogens.