Select the best answer or answers from the choices given: Which of the following can lead to decreased venous return of blood to the heart? (a) an increase in blood volume, (b) an increase in venous pressure, (c) damage to the venous valves, (d) increased muscular activity.

Q: Which chambers of the heart have the heaviest musculature?

A: The circulatory system is one of the most essential systems in the body. The function of the…

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: Why is it necessary for cells of the cardiac atria and ventricles to contract in a coordinated…

A: Introduction :- Blood from the veins enters the two atria, which have thin walls. The heart's two…

Q: What is the functional significance of the difference in thickness between the wall of the aorta and…

A: The aorta is the main artery which carries blood away from heart to the rest of  body.  The…

Q: Identify the four valves of the heart?

A: Step 1 The human heart is hollow, a fibromuscular conical pyramidal mesodermal organ that lies…

Q: What are the layers of the heart (in order) that a scalpel would pass through during dissection?…

A: The scalpel initially passes the fibrous pericardium and the next comes the parietal layer of the…

Q: what is the function of the many coverings of the heart and the three layers of the heart itself?

A: The heart is a hollow muscular organ which is involved in pumping the blood through the circulatory…

Q: What is the blood flow of the heart?

A: Blood is the body fluid that is composed of plasma and formed cell that circulates through the…

Q: What causes the heart sounds S1 and S2?

A: The human heart is situated in the middle of the thoracic cavity in a space called the mediastinum.…

Q: What would be the drawback of cardiac contractions being the same duration as skeletal muscle…

A: Cardiac muscles are specialized in the way that long action potentials are generated in the cardiac…

Q: Why is the left side of the heart larger than the right?

A: The right side of the heart is designed to pump the blood into the lungs and then to receive oxygen.…

Q: What anatomical feature prevents the electrical signal from traveling directly from atrial muscle to…

A: The heart is a muscular organ that is divided into the left and right side to prevent the mixing of…

Q: The heart wall that covers papillary muscle?

A: Heart is a muscular organ comprised of involuntary cardiac muscles which dinxriona to pimp blood…

Q: Kim Sung was told that her baby was born with a hole in the upper chambers of his heart. Is this…

A: The human blood circulates between the four chambers of the “heart”. The top two heart chambers (the…

Q: Which layer is both a part of the pericardium and a part of the heart wall?

A: The human heart is situated in the middle of the thoracic cavity in a space called the mediastinum.…

Q: Why do you think it is important for heart valves to ensure that blood flows in only one direction…

A: Human heart is the Center for regulating blood across the body. It is made up of cardiac Muscles…

Q: Which region of the heart is innervated by the sympathetic division but not by the parasympathetic…

A: Heart is the vital part of the body that help in the circulation of blood, oxygen and nutrients…

Q: Name the sound produced when the atrioventricular valves close the heart.

A: The heart has four chambers through which the blood flows when the cardiac valves open and close…

Q: Inflammation of the pericardium can lead to a condition called pericardial effusion, in which fluids…

A: The heart is a conical hollow organ which consists of four chambers. Two auricles and two ventricles…

Q: From what sources does blood flow into the upper and lower chambers of the heart? What are the…

A: Heart pumps blood through a system of blood vessels, called the circulatory system. The heart is a…

Q: What are the principal heart valves, and what is the function of each?

A: Human heart is a organ which is part of circulatory system and is situated in the space of thoracic…

Q: Draw the interior view of the heart?

A:

Q: What changes in cardiac function might you expect after surgical replacement of a defective heart…

A: The mammalian heart is a four chambered muscular organ with valves. The valve between the right…

Q: Why is the left ventricle of the heart thicker than the right ventricle

A: Heart pumps blood to the body. Human heart has four chambers, 2 atria and 2 ventricles. Both the…

Q: why a leaking heart valve may cause heart damage over time?

A: Leaky heart valve can affect any of the four heart valves: 1)Aortic valve ( left ventricle and…

Q: Considering the function of the heart, why is it important that the myocardium cannot be tetanized?

A: Tetanized state is a sustained muscle contraction. This happens because muscle’s motor unit is…

Q: what should the normal heart beat at

A: Heart beat includes on complete cycle of systole and diastole or the unifying force called pulsation…

Q: What kind of catabolism occurs in the heart?

A: The heart pumps blood through a system of blood vessels, called the circulatory system. The heart…

Q: What is the name of the main vessel that moves blood out of the heart?

A: The heart is a huge muscular pump that is divided into two halves, one on the right & one on the…

Q: How are the two heart sounds produced during cardiac cycle? Which one of these is of longer…

A: The cycle that involves the end of one heartbeat and initiation of the second heartbeat is called…

Q: Name the major branches of the heart.

A: The heart is the blood-pumping organ in the animals. It pumps blood via the blood vessels of the…

Q: Match the terms in column A with the descriptions in column B.  Column B1. upper chamber of the…

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

Q: How can the heart be strong enough to pump blood up your legs against gravity?

A: The heart is incapable of pumping blood back up the veins in your legs and back to your heart on its…

Q: What happens when there is an abnormality of the heart’s intrinsic electrical conduction system?

A: The conduction system of the heart is a collection of nodes and conduction cells that are…

Q: What are abnormal heart sounds? What do these heart sounds indicate?

A: The flow of blood through the heart produces vibrations in the heart valves and chambers to generate…

Q: What is the function of the conduction system of the heart?

A: The heart is a muscular organ responsible for pumping blood and distributing oxygen as well as…

Q: What would be the path of blood flow through the heart if the foramen ovale did not close shortly…

A: The foramen ovale is a tiny hole in the septum, the wall that separates the heart's two upper…

Q: What is the difference between the heart sounds of lupp and dupp?

A: Lub and dup are cardiac sounds that can be detected with a stethoscope placed on the chest just…

Q: What is the structure of the heart? How does the heart work?

A: Human heart is a four chambered muscular organ.It shape and size is roughly like a closed fist of…

Q: What is the significance of the difference in thickness of the ventricular walls?

A: The ventricle is one of the two large chambers towards the bottom of the heart that collects and…

Q: What are the basic blood vessels in the heart? Describe briefly the function of each.

A: The circulatory framework, likewise called the cardiovascular framework or the vascular framework,…

Q: What is the significance of the difference in thickness between the wall of the aorta and the wall…

A: Introduction: The largest artery present in human body is the aorta which starts from the top of the…