In the pause between the 2nd sound (dub) of one beat and the 1st sound (lub) of the following beat the ventricles are in __________ and the atrioventricular valves are _________.   A Systole; open   B Systole; closed   C Diastole; open   D Diastole; closed

Q: The cardiac valves consist of a central core of dense fibrous connective tissue lined on both sides…

A: There are four valve present in the heart which helps in regulation of blood flow. Blood flow in a…

Q: Match each function to the correct cardiac valve. Prevents backflow of blood into the left atrium.…

A: Heart pumps blood to the body. Heart of mammals and birds has four chambers, 2 atria and 2…

Q: The coronary arteries branch off of the ________.a. aortic valveb. ascending aortac. aortic archd.…

A: The human heart is a four-chambered muscular organ that pumps blood throughout the body. It pumps…

Q: Which of the following sequences is truly a systemic circulation pathway? A Right ventricle →…

A: The cardiovascular system is also called a vascular system. The cardiovascular system consists of…

Q: The circulatory route from aorta to the venae cavae is the __________ circuit.

A: The heart is the most important organ for the body and made up of several different types of tissues…

Q: The ascending aorta and pulmonary trunk develop from the embryonic:- a. bulbus cordis only. b.…

A: Ascending aorta refers to the part of the aorta that begins at the upper region of the left…

Q: Given these events, the correct sequence of the cardiac cycle is: i. Atrial diastole ii. Atrial…

A: In the cardiac cycle, diastole means that the heart chamber is filled with blood received from the…

Q: Which of the following contains blood with a relatively high oxygen content? Group of answer…

A: Circulatory system is one of body system  that mainly comprises of :-  1 ) Heart  2 ) Blood  3 )…

Q: Choose the best answer Blood moving from the left atrium to the left ventricle passesthrough which…

A: Heart is the main organ pumping blood. Heart is myogenic meaning it is capable of auto excitation.…

Q: Looking at the wiggers diagram Which of the letters A-F would be the point when semilunar valves…

A: The stress exerted by pumping blood on the artery walls is called blood pressure. Blood pressure is…

Q: the amount of blood pumped by the ventricucles each is referred to as

A: The heart of a human being consists of 4 chambers with two on the right side and two on the left…

Q: Which of the following structures in the circulatory system carries oxygenated blood? a pulmonary…

A: The circulatory system consists of heart, blood and blood vessels. Type of blood vessels which…

Q: The cardiac cycle consists of a distinct relaxation andcontraction phase. Which term is typically…

A: The cardiac cycle is the process of contraction and relaxation of the heart. The primary function of…

Q: The sac that provides a fluid-filled cushion for the heart is composed of (z) an inner visceral…

A: The conical sac of fibrous tissue, which surrounds the heart and the roots of the great blood…

Q: Which row shows the chambers of the heart, from those with the thickest walls to those with the…

A: The human heart has two atrium which are separated by the interatrial septum from each other. There…

Q: During the cardiac cycle shown in the graph above the ventricles eject _______ of the blood they…

A: The cardiovascular system consists of the heart and the blood vessels. The heart is the pumping…

Q: Which of the terms in the following pairs is correctly matched? Group of answer choices Heart…

A: Let us first understand the concept before matching A. Systole occurs when the heart contracts to…

Q: The first heart sound is heard as the ECG records the end of the ______.   A P wave   B T-P…

A: An electrocardiogram (ECG or EKG) records the electrical signal from your heart to examine for…

Q: Aorta Aortic semilunar valve Bicuspid atrioventricular valve Chordae tendineae Inferior vena cava…

A:

Q: Read the following statements: Statement A: Ventricular diastole leads to reduction in ventricular…

A: A heart is a muscular pumping organ of the circulatory system along with the blood and blood…

Q: Answer question from image

A: Cardiac catheterization is performed to evaluate heart function, the presence of heart disease, and…

Q: The ___ valves are positioned between the ventricles and blood vessels.

A: Heart valves run in one direction because it prevents the backflow of blood and blood flows in a…

Q: The two tubes that eventually fuse to form the heart arereferred to as the ________. a. primitive…

A: Gastrulation refers to the procedure by which cells of the blastula get recognized to produce the…

Q: During systemic circulation, blood leaves the __________."   A right atrium and goes directly to…

A: Complete double circuit circulatory system is found in crocodiles, birds and Mammals. Their heart is…

Q: Put the following events in the proper order for cardiac conduction. Group of answer choices:   SA…

A: The activity of the heart depends upon electrical impulses.

Q: The ""lub-dup"" heart sounds are produced by the _______"   A "opening of the atrioventricular…

A: Heart sounds are heard by auscultation using a stethoscope. It is an important aspect of the…

Q: As blood in the ventricles surges back against the closed AV valves, the first heart sound lubb can…

A: The heart is a muscular organ the size of a fist that sits directly behind and somewhat to the left…

Q: Which process is being illustrated in the diagram (see picture)? Semilunar valves closed…

A: In this question asked about the cardiac cycle.  Cardiac cycle is event in the heart contractions.…

Q: In an ECG, which of the following represents the repolarization of the ventricles? Group of answer…

A: An electrocardiogram (ECG) is a test that measures the electrical activity of the heartbeat. The…

Q: All the blood that passes through the aorta, except the blood that flowsinto the coronary vessels,…

A: Resistance is a force that opposes the flow of a blood.

Q: stions. Which structure is labelled "E"? Aorta Black arrows indicate direction of blood flow Blue…

A: The human heart is a muscular organ that pumps blood. It is about the sized of a clenched fist. The…

Q: The coronary arteries arise from the __________.   A right atrium   B inferior vena cava   C…

A: The coronary system comprises of arteries, arterioles, capillaries, venules and veins. These…

Q: A heart ventricle partially divided by an incomplete septum is found in frogs snakes birds and…

A:

Q: Mitral valve prolapse is a disease where the valve between the left atrium and left ventricle…

A: The mitral valve permits blood to flow from the left atrium into the left ventricle, but not in the…

Q: the heart during a single complete are True/False. The duration of systole exceeds that o

A: The cardiac cycle is defined as the period between the start of one heartbeat to the start of the…

Q: Which of the following is/are true concerning the opening and closing of the cardiac valves? A.…

A: Backward blood flow is prevented by the valves. On each end of the two ventricles are flaps that act…

Q: Which chamber initially receives blood from thesystemic circuit?a. left atriumb. left ventriclec.…

A: The heart is a hollow muscular organ that pumps the blood through the circulatory system by rhythmic…

Q: During heart development, the primary outcome of cardiac looping is Fusion of the aortic sac vessels…

A: Heart development occur in various stages.

Q: As blood in the great arteries ricochets back against the closed semilunar valves, the second heart…

A: The second  heart sound is caused by the closure of the aortic and pulmonary truck semilunar valves…

Q: Which valves are closed during isovolumetric contraction & isovolumetric relaxation of the…

A: The Human heart is the Center for regulating blood across the body. It is located within the…

Q: Looking at the wiggers diagram. Notice, time stamp 370-410msec in the left ventricular volume the…

A: Ventricular diastole It is defined as the period of cardiac cycle during which the two ventricles…

Q: The ___ valves are positioned between the atria and the ventricles.

A: Heart the mesodermally derived organ, is situated in the thoracic cavity in between the lungs,…

Q: The volume of blood in the ventricle at the end of a systole or ejection period is known as

A: The cardiac cycle is the time period that begins with atrioventricular contraction and concludes…

Q: What valve prevents the backflow of blood from the right ventricle into the right atrium? right…

A: One of the most essential systems in the human body is the circulatory system. It is made up of the…

Q: As blood in the ventricles surges back against the closed AV  valves, the first heart sound ("lubb")…

A: The heart is the hollow pumping organ of the body that is responsible for circulating the blood to…

Q: Which of the following term and definition pair is correctly matched? Group of answer choices…

A: The heart is a hollow muscular organ that is located behind the sternum and between the lungs. The…

Q: Trabeculae ___ are visible on the inner surface of the ventricles

A: The human heart is four-chambered with two atria and two ventricles that help in pumping the blood…

Q: Which of the events below does not occur when the semilunar valves are open?   A Ventricles are in…

A: The heart valves regulate the blood flow into and out of the heart. The normal human heart contains…

Q: The aortic valve closes when pressure in the __ is higher than pressure in the ___. -- -

A: The cardiac cycle is referred to as one heartbeat that consists of one cycle of contraction and…

Q: Blood is carried to capillaries in the myocardium by way of:     coronary arteries     the…

A: The myocardium is a thick middle layer of the cardiac wall that is composed of contracting muscle…