These four chambers are separated from each by various valves. The tricuspid valve separates the right atrium and right ventricle and the mitral separates the left atrium and left ventricle. Two valves separate the ventricles and the large blood vessels. The aortic valves separates the left ventricle and the aorta and the pulmonic valve which separates the pulmonary artery and the right ventricle. The blood vessels are a intricate network of tubes that transport blood throughout the body.
From the lungs, blood drains into the left atrium and is then pumped into the left ventricle. The left ventricle then pumps this oxygen-rich blood out into the aorta which then distributes it to the rest of the body through other arteries. The heart is a hollow, muscular organ; its job is to pump blood through a network of blood vessels. The vessels form a circle, which starts at the heart, goes out through the body, then ends back at the heart again. The heart has two sides, the right and the left side.
They have a single nucleus, which helps determine the type of muscle class it is. These fibers are short and branching and are often Y- or V- shaped (Parker, 2007). Their main function is to propel blood into circulation. Contraction of cardiac muscle tissue happens by an impulse sent from the medulla oblongata to the sinatorial node, also known as the heart’s natural pacemaker (Thibodeau & Patton, 2008). Smooth muscle is another one of the muscle types that make up the muscular system.
Cardiac Cycle * The heart is a muscle that pumps blood throughout the body. Of course, the process is not quite that simple. The heart has four chambers, two on the right (right atrium and right ventricle) and two on the left (left atrium and left ventricle). The right side is responsible for accepting blood from the body and getting it to the lungs. The lungs add oxygen to the blood and remove carbon dioxide.
Ventricle pumps blood into PULMONARY trunk (almost immediately branches into the pulmonary arteries), which carries deoxygenated blood to the lungs away from the heart. 5) Blood becomes OXYGENATED in the lungs, and then travels to LEFT ATRIUM in PULMONARY VEIN (carries oxygenated blood towards heart). 6) From the LEFT ATRIUM, blood passes through bicuspid valve into the LEFT VENTRICLE 7) REPEAT!! * As blood flows away from the heart, it transported to the body’s organs and tissues in relatively large vessels. * HEART ARTERIES ARTERIOLES CAPILLARIES VENULES VEINS 3.
| * Question 1 0 out of 1 points | | | Group of vessels where the blood volume is greatest. | | | | | Selected Answer: | Capillaries | Answers: | Arterioles | | Capillaries | | Large veins | | Large arteries | | | | | * Question 2 0 out of 1 points | | | Which vessels permit the exchange of nutrients and gases between the blood and tissue cells? | | | | | Selected Answer: | arteries | Answers: | capillaries | | arteries | | arterioles | | veins | | | | | * Question 3 0 out of 1 points | | | These vessels are sites where blood pressure is most commonly measured. | | | | | Selected Answer: | Arterioles | Answers: | Veins | | Arteries | | Arterioles | | Capillaries | | | | | * Question 4 0 out of 1 points | | | Which group of vessels contains blood under the lowest pressure? | | | | | Selected Answer: | Capillaries | Answers: | Arterioles | | Large arteries | | Capillaries | | Large veins | | | | | * Question 5 0 out of 1 points | | | Which of the following is not one of the three main factors influencing blood pressure?
Cardio vascular and respiratory system Describe the structure and function of the cardiovascular system (P5) Blood vessels Arteries and arterioles | The arteries and arterioles carry the blood away from the heart (always oxygenate apart from the pulmonary artery which goes to the lungs). They have thicker muscular walls, and have smaller passageways for blood (internal lumen) they contain blood under high pressure. | | capillaries | Capillaries are found in the muscles and lungs. It is microscopic – one cell thick. Very low blood pressure.
Then the semilunar valves in the arteries close as the arterial blood pushes against them. The cardiac cycle explained *A wave of electrical activity spreads out from the SAN across both atria this causes them to contract. *Prevention of the waves crossing to the ventricles is due to the layer of non-conductive (atrioventricular septum). *The wave of electrical activity is allowed to pass through a second group of cells called the AVN, which lies between the atria. *After a short delay the AVN conveys a wave of electrical activity between the ventricles along a series of specialised muscle fibres called the bundle of his.
There are how many liters of blood in the body? A. 0-1 B. 2-3 C. 4-5 D. 6-7 5. Which artery is palpated when taking a pulse at the neck?
Lung function (peak flow) Blood pressure The blood pressure is the pressure of the blood within the arteries. It is produced primarily by the contraction of the heart muscle. Its measurement is recorded by two numbers. The first (systolic pressure) is measured after the heart contracts and is highest. The second (diastolic pressure) is measured before the heart contracts and lowest.