Human Circulatory System Quiz

Pulmonary circulation and systemic circulation.

Tissue fluid supplies oxygen and nutrients to the cells and removes carbon dioxide and waste products.

Lymph consists of a cellular part, primarily leukocytes, and a non-cellular part made up of about 94% water and 6% proteins, fats, and other substances.

<p>Lymphatic vessels transport lymph from tissues to lymph nodes and eventually return it to the bloodstream.</p> Signup and view all the answers

<p>It enters the lymph vessels and is then referred to as lymph.</p> Signup and view all the answers

<p>Lymph has nutritive, drainage, absorption, and defense functions.</p> Signup and view all the answers

<p>Lymphocytes are the predominant cells in the lymph.</p> Signup and view all the answers

<p>Muscle contractions help propel lymph through the lymphatic vessels.</p> Signup and view all the answers

<p>The atria are the receiving chambers that receive blood, while the ventricles are the distributing chambers that pump blood to the lungs and the rest of the body.</p> Signup and view all the answers

<p>The tricuspid valve regulates blood flow from the right atrium to the right ventricle, while the bicuspid valve regulates flow from the left atrium to the left ventricle.</p> Signup and view all the answers

<p>The SA node is known as the natural pacemaker of the heart as it generates electrical impulses that regulate the heart's rhythm and contractions.</p> Signup and view all the answers

<p>The vena cavae are large veins that transport deoxygenated blood to the right atrium, with the superior vena cava bringing blood from the upper body and the inferior vena cava from the lower body.</p> Signup and view all the answers

<p>Semi-lunar valves resemble half moons and regulate blood flow from the ventricles into the pulmonary artery and aorta, preventing backflow into the ventricles.</p> Signup and view all the answers

<p>Atria have thinner walls, suitable for receiving blood, while ventricles have thicker, muscular walls for strong contractions needed to pump blood effectively.</p> Signup and view all the answers

<p>The heart’s rhythmic contractions generated by the SA node and the presence of valves regulate blood flow and prevent backflow.</p> Signup and view all the answers

<p>Oxygenated blood is carried by the aorta, while deoxygenated blood is brought to the right atrium by the vena cavae.</p> Signup and view all the answers

<p>The three main components are the heart, blood, and blood vessels.</p> Signup and view all the answers

<p>The pacemaker regulates the heartbeat by generating electrical impulses that cause the heart muscles to contract.</p> Signup and view all the answers

<p>Arteries carry oxygenated blood away from the heart, while veins return deoxygenated blood back to the heart.</p> Signup and view all the answers

<p>The primary function of lymph is to transport excess tissue fluid back to the bloodstream and to aid in immune responses.</p> Signup and view all the answers

<p>The universal donor blood group is O, as it has no A or B antigens on its red blood cells.</p> Signup and view all the answers

<p>The septum separates the left and right portions of the heart, preventing the mixing of oxygenated and deoxygenated blood.</p> Signup and view all the answers

<p>Cardiac arrest is a condition where the heart stops pumping blood, leading to a lack of oxygen to the body and potentially death.</p> Signup and view all the answers

<p>Pericardial fluid cushions the heart, protecting it from shocks and reducing friction during heartbeats.</p> Signup and view all the answers