Heart failure Sometimes called congestive heart failure, heart failure occurs when the heart muscle is weakened or damaged. It can no longer pump the volume of blood needed through the body. Early symptoms of heart failure include fatigue, swelling in your ankles, and increased need to urinate at night. More severe symptoms include rapid breathing, chest pain, and fainting.
Blood vessel that moves blood away from the heart Vein Blood vessel that moves blood toward the heart Aorta Major artery that carries blood to the systemic circulatory system Capillary Small blood vessel that allows nutrient exchange Atrium Upper chamber of the heart Ventricle Lower chamber of the heart The circulatory system The circulatory system is a network consisting of blood, blood vessels, and the heart.
This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products. The heart The heart is made of specialized cardiac muscle tissue that allows it to act as a pump within the circulatory system. The human heart is divided into four chambers.
There are one atrium and one ventricle on each side of the heart.
The atria receive blood and the ventricles pump blood. The human circulatory system consists of several circuits: The pulmonary circuit provides blood flow between the heart and lungs. The systemic circuit allows blood to flow to and from the rest of the body.
The coronary circuit strictly provides blood to the heart not pictured in the figure below. Diagram showing the flow of blood from the heart to the rest of the human body. Arteries carry blood away from the heart and into capillaries, providing oxygen and other nutrients to tissue and cells.
Once oxygen is removed, the blood travels back to the lungs, where it is reoxygenated and returned by veins to the heart. Diagram labeling the major arteries red and veins blue in the human body The main artery of the systemic circuit is the aorta which branches out into other arteries, carrying blood to different parts of the body.
Common mistakes and misconceptions Arteries usually carry oxygenated blood and veins usually carry deoxygenated blood. This is true most of the time.
However, the pulmonary arteries and veins are an exception to this rule. Pulmonary veins carry oxygenated blood towards the heart and the pulmonary arteries carry deoxygenated blood away from the heart.
Blood is always red.
Veins can appear blue as we see them through our skin, leading some people to believe that deoxygenated blood is blue. However, this is not the case!
Blood only appears blue because of the way tissues absorb light and our eyes see color. Although oxygen does have an effect on the brightness of the blood more oxygen makes a brighter red, less makes it darkerblood is never actually blue.
The circulatory and respiratory systems.Aug 01, · The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body.
The heart is made up of four different blood-filled areas, and each of these areas is called a chamber. There are two chambers on each side of the heart.
One chamber is . Aug 01, · The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart.
The circulatory system is a network consisting of blood, blood vessels, and the heart. This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products. The circulatory system is made up of blood vessels that carry blood away from and towards the heart.
Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
Our bodies actually have two circulatory systems: The pulmonary circulation is a short loop from the heart to the lungs and back again, and the systemic circulation (the system we usually think of as our circulatory system) sends blood from the heart to all the other parts of our bodies and back again.