Circulatory System

One can find instructions on how to draw a heart with wings from a wide variety of sources, including the art section of ones local library. One can also find this information via online streaming websites such as YouTube. YouTube will offer instructional videos on how to draw a heart with wings.

It is important for blood to flow in one direction in the heart because blood can't flow backwards because it has oxygen rich blood and poor oxygen rich blood and these to types of blood cannot mix :)

The heart sends deoxygenated blood to the lungs, via the pulmonary arteries - thus this system is called the pulmonary circuit

De-oxygenated blood flows from right ventricle of heart to lungs through two pulmonary arteries for oxygenation. After oxygenation the blood now travels through the pulmonary veins to left auricle of heart. Two pulmonary veins from each lung reach the heart making a total of four pulmonary veins. This circulation of blood to and from lungs is called pulmonary circulation. The pulmonary vein is thus the only vein which carries oxygenated blood and pulmonary artery in the same way the only artery to carry deoxygenated blood.

It only has one flow of blood.

We have two flows of blood, one for the lungs and one for the body. This also means the worm will only have two heart chambers while you have four.



P.S. This is the third question on circulation i have answered today, is this someone typing in all their homework questions?

They are both principally composed of special interconnected cells called neurons and are both involved in the coordination of multiple bodily functions, by conducting the great variety of stimuli (both within the nervous tissue as well as from and towards most of the other tissues).

The heat pumps and sends the blood to different parts of the body. The heart beating looks like the pump.

r atrium r ventricle pulomanry artery lung capillaries pulmonary vein l atrium l ventricle aorta

To find your answer, your first step is to divide the time (in this case a minute...a minute equals sixty (60) seconds) by the heart rate (e.g. 80 beats). So---60 divided by 80 will give you 0.75 seconds. Your answer will justify the time/length of the cardiac cycle.

• fishes - 2 chambered heart with sinus venosus and conus arteriosis
• human - 4 chambered heart

There is a group of cells in the heart called the "pacemaker" that sends out a nerve shock to initiate a heartbeat. It also changes the pulse depending on certain external conditions to maintain homeostasis.

-Richard

by suking it

The semilunar valves control the flow of blood from the heart. The aortic semilunar valve controls the flow of blood from the left ventricle to the aorta, and the pulmonary semilunar valve controls the flow of blood from the right ventricle to the pulmonary artery.
Pulmonary valve

Aortic arch to descending thoracic aorta to abdominal aorta to celiac trunk to splenic artery

there really isn't any such thing as an ischaemic artery (it can happen, but I've never heard of it!). Rather ischemia (or ischaemia for our English and Australian friends) is a lack of sufficient oxygen delivery to a tissue. Oxygen is carried by HEMoglobin in the blood hence the iscHEMia. Ischemia is usually caused by an interruption to the blood flow to a particular area. One way to interrupt blood flow is to block an artery. (which usually deliver oxygenated blood to tissues) A blockage may be the result of a plaque (a fatty aggregation on the inside walls of an artery), or a thombus (clot), or an embolus of some sort. People often hear that they may have ischemic heart disease. This is a condition of severely narrowed arteries (often greater than 70% of their cross sectional area may be blocked) which leads to decreased blood (and hence oxygen) supply to the muscle of the heart. This can cause Angina. If the coronary arteries completely block off, then a heart attack will ensue, where cardiac muscle dies because of lack of oxygen. Treatment ranges from medications to: lower cholesterol, decrease oxygen consumption of the heart, vasodilators to increase delivery of blood through that artery; to surgery to operate and either re-open the blocked vessel (balloon angioplasty and stenting ) or procedures to essentially replace the diseased vessels in By-pass surgery (CABG- coronary artery bypass grafting). Hopefully that helps!! Aj :)

The pulmonary circulation is the portion of the cardiovascular system which carries oxygen-depleted blood away from the heart, to the lungs, and returns oxygenated blood back to the heart while for the systemic circulation, it is the portion of the cardiovascular system which carries oxygenated blood away from the heart, to the body, and returns deoxygenated blood back to the heart... :D

visceral pericardium

The receiving chambers are the atria (singular atrium). The right atrium receives deoxygenated blood from the body, and the left atrium receives oxygenated blood from the lungs.

The right atria receives blood from the veins (systemic).

The left atria receives blood from the lungs (pulmonary).

Yes, the heart and lungs are superior to the organs of the abdomen in that they are located above those organs.

The heart and blood vessels are part of the cardiovascular system. Cardio- or cardiac refer to the heart. Vascular refers to the blood vessels. Circulation or circulatory refers to the movement of blood through the vascular system.

With a double circulatory system, the heart can increase the pressure of the blood after the blood has picked up oxygen from the lungs. This means it can transport oxygen to the body tissues much quicker.

Left Ventricle to Left side of brain via common carotid Left Ventricle Aortic (semi-lunar) valve Ascending aorta Aortic arch Left common carotid artery Left carotid sinus Left internal carotid artery Left anterior cerebral artery

Four main blood vessels enter/exit the heart: two veins and two arteries. Oxygenated blood enters the left ventricle through the pulmonary vein. This same blood is then pumped out of the left atrium via the aorta. Meanwhile, de-oxygenated blood enters the heart in the vena cava; before leaving through the pulmonary artery.

The membranes from superficial to deep are:

A sac-like structure called pericardium. It is comprised of two parts - the outer fibrous pericardium and an inner double-layered membrane itself made up of parietal and visceral pericardium.