The cardiovascular system Is complex and extends beyond our heart through arteries. Veins and capillaries that carry blood throughout the body. An article read on aging and Characterization by Rash Changer talks about the declining heart of the elderly as they progress within their age. The article sums of the study and finds that with the rapid Increase In the elderly population, the Incidence of Chemic heart disease in these elderly individuals is also expected to increase rapidly.
Right atrium to right ventricle to pulmonary trunk to right and left pulmonary arteries to pulmonary capillaries of the lungs to right and left pulmonary veins to left atrium of the heart. Pulmonary circuit or pulmonary circulation. The pericardial serous fluid acts as a lubricant to decrease friction as the heart beats.
Period of contraction of the heart usually refers to ventricular contraction. Period of relaxation of the heart musculature. The amount of blood pumped out by a ventricle with each contraction.
The time for one complete heartbeat, from the beginning of one systole to the beginning of the next. The heart has an intrinsic ability to beat contractwhich is different from all other muscles in the body. Whereas the nervous system may increase or decrease its rate, the heart continues to beat even if all nervous connections are cut.
Activity of the sympathetic nervous system as during physical or emotional stressexcess or lack of certain Cardiovascular system notes essay ions, increased temperature, hormones epinephrine, thyroxinesudden drop in blood volume, age, gender, and exercise.
A single layer of squamous epithelium; provides a smooth, friction-reducing lining for the vessel.
A middle layer, consisting of smooth muscle and connective tissue primarily elastic fibers. The elastic fibers provide for stretching and then passive recoil of vessels close to the heart, which are subjected to pressure fluctuations; the smooth muscle is activated by the sympathetic nervous system when vasoconstriction and increases in blood pressure is desired.
The outermost layer, made of fibrous connective tissue; basically a protective and supporting layer. Capillary walls are essentially just the tunica intima endothelium plus the basement membrane ; thus, they are exceedingly thin.
Arteries are much closer to the pumping action of the heart and must be able to withstand the pressure fluctuations at such locations.
The presence of valves, the milking action of skeletal muscles against the veins as the muscles contract, the respiratory pump pressure changes in the thorax during breathing.
Pulmonary arteries carry oxygen-poor blood and pulmonary veins carry oxygen-rich blood. Umbilical arteries carry oxygen-poor blood from the fetus and the umbilical vein carries the most oxygen-rich blood to the fetus. Left ventricle to ascending aorta to aortic arch to brachiocephalic artery to subclavian artery to axillary artery to brachial artery to radial or ulnar artery to capillary network of wrist to radial or ulnar vein to brachial vein to axillary vein to subclavian vein to right brachiocephalic vein to superior vena cava to right atrium of the heart.
Left ventricle to ascending aorta to aortic arch to descending aorta to right common iliac artery to external iliac artery to femoral artery to popliteal artery to anterior tibial artery to dorsalis pedis artery to capillary network to anterior tibial vein to popliteal vein to femoral vein to external iliac vein to common iliac vein to inferior vena cava to right atrium of the heart.
Alternatively, the sequence between the capillary network and external iliac vein could be stated as: The hepatic portal circulation carries nutrient-rich blood from the digestive viscera to the liver for processing before the blood enters the systemic circulation.
A portal circulation involves a capillary bed that is both fed and drained by veins; the usual circulation has a capillary bed that is fed by arteries and drained by veins.
In a fetus, both liver and lungs are nonfunctional the liver relatively so. The ductus venosus bypasses the liver. The ductus arteriosus and the foramen ovale bypass the lungs.
The umbilical vein carries nutrient-rich and oxygen-rich blood to the fetus through the umbilical cord.The Cardiovascular System - The Cardiovascular System The cardiovascular system is made up of the heart, blood vessels and the blood and its main functions include the transportation of blood around the body, protection from invading microorganisms and to prevent blood loss through haemostasis.
The Cardiovascular System - The Cardiovascular System The cardiovascular system is made up of the heart, blood vessels and the blood and its main functions include the transportation of blood around the body, protection from invading microorganisms and to prevent blood loss through haemostasis.
Essay about Circulatory System Notes; Essay about Circulatory System Notes. Submitted By cwcat Words: Pages: 3. Open Document. Circulatory System Oxygen and nutrient distribution to cells around the body through diffusion.
Cardiovascular and Circulatory System Essay.
Read this essay on Cardiovascular Disease Notes. Come browse our large digital warehouse of free sample essays. narrowing (atherosclerosis) of the blood vessels, including the coronary arties, and other diseases of the circulatory system.
The majority of cardiovascular disease (CVD) is caused by risk factors that can be controlled, treated. Cardiovascular System Study Notes Essay CORONARY SULCUS EXISTS BETWEEN THE ATRIA AND THE VENTRICLES OF THE HEART.
The cardiovascular system, also known as the circulatory system, refers to the network that transports blood throughout the body. It is composed of the heart, blood vessels, and blood.
Circulation has two systems: pulmonary circulation, from heart to lungs and back, and systemic circulation, from heart to body tissues and back. Arteries carry blood away from heart. Veins carry blood back to heart.
Arteries become arterioles which become capillaries. Capillaries is where exchange.