Untitled Deck Flashcards
(27 cards)
What comprises the circulatory system?
The circulatory system comprises the heart, blood vessels, and blood.
What is the main function of the circulatory system?
The main function of the circulatory system is to carry oxygen, nutrients, and hormones to cells, and remove waste products like carbon dioxide.
What is the heart?
The heart is a hollow muscular organ located in the chest, about the size of a fist, that continuously pumps blood around the body.
What are the four chambers of the heart?
The four chambers of the heart are the right atrium, right ventricle, left atrium, and left ventricle.
What are the functions of the ventricles and atriums?
Ventricles are the receiving chambers of the heart, while atriums are the pumping chambers.
What are the four valves of the heart?
The four valves of the heart are the tricuspid valve, pulmonary valve, mitral valve (or bicuspid valve), and aortic valve.
What is the function of the heart valves?
The heart valves function as gate valves that prevent the backward flow of blood inside the heart.
What are blood vessels?
Blood vessels are tubes throughout the body that carry blood.
What are the two main types of blood vessels?
The two main types of blood vessels are arteries and veins.
What do arteries do?
Arteries carry oxygenated blood away from the heart.
What do veins do?
Veins carry deoxygenated blood toward the heart.
What is blood?
Blood is a river of life that carries oxygen and nutrients needed by the body’s tissues and organs.
What components make up blood?
Blood is made up of red blood cells, white blood cells, platelets, and plasma.
What are the primary organs of the excretory system?
The primary organs of the excretory system are the kidneys, ureters, urinary bladder, and urethra.
What is the function of the kidneys?
The kidneys filter the blood, maintain water-salt balance, regulate acid-base balance, assist hormone secretion, and help activate vitamin D.
What is a nephron?
A nephron is the unit inside the kidney capable of producing urine.
What is the function of the urinary bladder?
The urinary bladder is a hollow muscular tube that stores urine until it is expelled from the body.
What is the function of the urethra?
The urethra is a small tube that serves as a passageway for urine when a person is prompted to urinate.
What are the primary organs of the respiratory system?
The primary organs of the respiratory system are the nose, pharynx, larynx, trachea, bronchi, and lungs.
What is the function of the respiratory system?
The respiratory system filters, warms, and moistens air and conducts it into the lungs.
What are the two tracts of the respiratory system?
The respiratory system is divided into the upper respiratory tract and the lower respiratory tract.
What is respiration?
Respiration is the movement of air into and out of the lungs.
What is inhalation?
Inhalation (inspiration) refers to the movement of air into the lungs.
What is exhalation?
Exhalation (expiration) refers to the movement of air out of the lungs.
