The endocardium is composed of __________.   A collagen fibers and the lumen   B myocardiocytes   C a think layer of flat epithelial cells   D cardiac muscle cells

Q: Description 1. Microscopic blood vessels with thin, porous walls; site of gas exchange between…

A: microscopic blood vessels with small porous wall for exchange of gases between the blood and the…

Q: Which of the following is unique to cardiac musclecells?a. Only cardiac muscle contains a…

A: The cardiac muscles show the characteristics of both smooth and striated muscles. The cells of…

Q: A major difference between arteries and veins is thata. arteries always carry oxygenated blood;…

A: The circulatory system has blood vessels to carry blood from one place to another throughout the…

Q: Compared to the ventricles, the atria ____.   A do not contract as many times per minute   B…

A: It also removes waste products from the body. It has three components: blood, heart and the blood…

Q: When is the blood pressure in the left ventricle greater than the blood pressure in the aorta?   A…

A: Cardiac cycle is a cycle through which atrial contraction ends with  ventricular relaxation. When…

Q: The vessels that carry oxygen to the myocardium are called __________.   A pulmonary arteries   B…

A: Blood is the body fluid that flows in tube-like structures known as vessels and functions in the…

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

A: Human circulatory system Blood arteries that convey blood away from and towards the heart make up…

Q: For questions #10-20, match each term to its definition. _____ . Vein…

A: Heart is defined as the hollow muscular organ which is composed of several layers of cardiac muscles…

Q: When cardiac muscle tissue dies in adults, it is replaced with scar tissue composed of dense…

A: When a person has a heart attack, the lack of oxygen causes part of the tissue to be damaged. The…

Q: A Myocardial Infarction is defined as: a. Chest pain that usually starts with physical exertion and…

A: Human Heart is a four-chambered, fibro-muscular organ. There are two atria through which the heart…

Q: Endocarditis is an inflammation of which portion of the heart? a. pericardium b. endocardium c.…

A: Heart is an organ that pumps blood and is originated from mesodermal tissue. Heart is exclusively…

Q: This diagram shows a _______ and the green things being released into the space are _____. A.…

A: The branch of biology associated with studying the functions of living organisms’ body can be…

Q: The human heart is A) Neurogenic heart B) Myogenic heart O C) Pulsating heart D) Ampullary heart

A: Introduction:- The human heart is an organ that pumps blood through the circulatory system's veins,…

Q: If the left ventricle failed to pump blood effectively, blood would back up in the _____."   A left…

A: HEART FAILURE (HF) -The most common type of HF is left-sided HF. The left side of the heart must…

Q: Which of these conditions occurs in the repolarization phase of an action potential in pacemaker…

A: When the change in the membrane potential occurs due to voltage decrease, then it is called…

Q: The atrioventricular valves open because ______.   A relaxation of the ventricles causes the…

A: Atrioventricular valves These are the valves which connect the atrium to the ventricles. There are…

Q: After passing through the inferior vena cava blood passes through the ____.   A coronary sinus   B…

A: The cardiovascular system or circulatory system is comprised of blood pumping muscular organ, heart,…

Q: The cells of the myocardium behave as a single, coordinated unit called a Select one: О а. cardiac…

A: Cardiovascular system plays a vital role in the transport/supply of nutrients, gases and removal of…

Q: The diameter of veins is typically larger than that of arteries,becausea. veins must carry blood at…

A: Open and Closed circulatory systems are the two types of circulatory systems in our body. This…

Q: uestions. Which structure is labelled "J"? Aorta • Black arrows indicate direction of blood flow…

A:

Q: Use this labelled diagram of a human heart & major blood vessels to answer these Which structure is…

A: Introduction The Heart Is A Pump That Beats 60 To 100 Times Each Minute On Average. The Heart Pumps…

Q: 8. After passing through the aortic semilunar valve, a red blood cell accidentally flows backwards…

A: The aortic semilunar valve is the valve that is present between the left ventricle and the aorta.…

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: Blood passing through the ______ is deoxygenated.   A bicuspid valve   B pulmonary veins   C…

A: Blood circulation refers to the movement of blood through vessels of the body. It is induced by the…

Q: Which of the following characteristics is unique to capillaries and not to other blood vessels?…

A: The blood vascular system has various components that help in the smooth circulation throughout the…

Q: The lining of the heart chambers is called the __________.   A endocardium   B myocardium   C…

A: The heart is the muscular organ that pumps blood throughout the body. It is made of cardiac muscle.…

Q: Which is not true about our heart A. ventricular systole squeezes blood to the lungs and the body B.…

A: Heart is a muscular organ that helps puno blood to different body organs. It has four chambers,…

Q: 1- The left ventricular wall of the heart is thicker than the right wall in order to…

A: Introduction :- Near the heart base, the ventricular wall is thickest, and it thins out to 1-2 mm at…

Q: The normal pacemaker of the heart is the ______.   A sinoatrial node   B left atrium   C…

A: Heart is an important organ that pumps blood. Heart is myogenic in nature meaning it is capable of…

Q: The only vessels that provide direct access oxygen and nutrients to nearly every cell in the body…

A: Circulatory system is also known as cardiovascular system which allows circulation of blood and…

Q: he inferior vena cava brings blood from the lower regions of the body and empties into the…

A: the inferior vena cava is the largest vein and it carries deoxygenated blood from the lower body…

Q: Match the following:   ?  Myocardium  ? Parietal Pericardium   ? Endocardium  ?    Visceral…

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

Q: The advantage of having a heart with two atria is that a) oxygenated and deoxygenated blood are…

A: The human heart has 4 chambers :  Left atrium Right atrium Left ventricle Right ventricle The…

Q: 1. The tunica media of blood vessels contain the following structures except _____. A. endothelial…

A: The heart's role in any organism is to keep "blood" flowing continuously throughout the body. Blood…

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: Just number 18

A: Heart consists of four chambers- Right auricle, Right ventricle, Left auricle, Left ventricle.The…

Q: What do the vessels that are carrying oxygen-poor blood back to the heart have that stops blood from…

A: The circulatory system of the body is the transport system of the body. The main function of this…

Q: Organisms with circulating body fluid that is separate from the fluid surrounding the body cells…

A: Option a is correct.Closed circulatory system.

Q: Match the following structures with their functions a. blood clotting b. matrix of blood and…

A: Human body is a complex machine required in many processes to function efficiently. To keep these…

Q: The heart’s internal pacemaker beats by: a. an internal implant that sends an electrical impulse…

A: The heart is a muscular organ in numerous animals, which siphons blood through the veins of the…

Q: Which of these conditions results the unstable resting membrane potential seen in pacemaker cells?

A: The membrane potential is also termed transmembrane potential or membrane voltage. It is the…

Q: a) Referring to the Figure , which part of the heart's electrical conduction is known as the…

A: A pacemaker is a little gadget that is put under the skin in your chest to help control your pulse.…

Q: Which of the following statements about the circulatory system is false? A. Blood in the aorta is…

A: Option A  and Option B are True because:- Largest artery is the aorta, which connects to the heart…

Q: One difference between the semilunar valves and the atrioventricular valves is that only the…

A: The valves that are found between the atria and ventricles are termed as atrioventricular valves,…

Q: A membrane called the _____ covers the heart. A membrane superficial to this membrane is the _____.…

A: The pericardium is the thin sac-like covering of the heart. It lubricates the heart and is required…

Q: The left ventricular wall of the heart is thicker than the right wall in order to ________.   A…

A: Heart is muscle which pumps blood to all parts of your body to provide it with the oxygen and…

Q: Which of these events occurs during (ventricular) systole? A)Only the left ventricle contracts.…

A: Diastole and systole are two phases of the cardiac cycle. Systole occurs when the heart contracts to…

Q: f the sinoatrial node stopped generating action potentials the heart would _____.   A stop beating…

A: The heartbeat starts with an impulse generated by the sinoatrial node (SA node) also known as the…

Dissection

Dissection is the process of cutting up the tissue of a dead or live animal or plant, to do anatomical studies and surgical treatments. The purpose of dissection is to learn more about the overall structure of organs and organ systems and thereby understand the physiology of the organism.