The arteries carry nutrients and oxygenated blood to the body’s tissues. The veins return de-oxygenated blood to the heart, where the cycle repeats itself continuously. However the blood vessels have a closed type of cardiovascular system in which blood doesn’t come in direct contact with the body tissues. Instead the blood flows in restricted pathways called blood vessels. The blood vessels are pathways of blood flow in the body.
The blood from these arteries feeds the organs and systems (cells & tissues). Once the blood has given up all its oxygen it makes its way back through the heart, through the veins. Blood from the lower part of the body enters the heart through the inferior vena cava. Blood from the top of the body enters the heart through the superior vena cava. Blood only flows in one direction through the heart; the two values (bicuspid & tricuspid) ensure that this happens.
The left atrium of the heart receives oxygenated blood from the lungs via the pulmonary veins; this blood is transferred to the left ventricle and then pumped to all tissues in the body. One way valves at the exits from each chamber ensure that blood flows only in one direction. As resistance to blood flow through the general circulation is
It is not attached to the skeleton. Cardiac muscle – this is only found in the heart and the junction where the major vessels enter or leave the heart. This muscle appears to have similar properties to both skeletal and smooth muscle in that it contains fibres which are striped but unlike striped muscle there are branches which interconnect also known as intercalculated discs. As we need to keep alive, cardiac muscle is an involuntary muscle. Nervous tissue – this is only found in the nervous system and consists of two different tls which transmit nerve impulses throughout the body
D1 The cardiovascular and respiratory system interlink with each other, this is because they both have a link when it comes to gases exchange. This is because inside the lungs there are air sacs they are called the alveoli there are millions of alveoli, around each alveoli are capillaries which are small blood vessels, as the walls of this is thin carbon dioxide goes into the alveoli from the capillaries and the oxygen goes back into the capillaries which then goes into heart, and the heart pumps blood all around the body. These systems work very closely together, this is to make sure that organ tissues get enough oxygen. Oxygen is needed for cellular function. The air which we breathe in which is kept in the lungs, is the transferred into blood.
As the now oxygenated blood flows back through the left atrium, it does so under increased pressure. However, the mitral valve which is made up of two triangular flaps, prevents blood from flowing back into the atrium once it enters the left ventricle atrium and instead continuing its journey through to the aorta. http://www.healthline.com/human-body-maps/mitral-valve The aortic valve: The aortic valve is located between the
These are the only veins which carry oxygenated blood. The Systemic Circulation: The systemic or general circulation constitutes the circulation of blood from the left ventricle through the main artery, the aorta to all the parts of the body and is again returned to the right side of the heart by the superior and inferior Venacava. Oxygenated blood leaves the left ventricle through the aorta which branches and reaches every part of the body supplying 02 and nourishment to the body tissues. Similarly the deoxygenated blood is carried through the veins which eventually forms superior and inferior Venacava and gets poured into the right artrium of the heart. Portal
The cardiovascular system is a complex network of the heart, blood vessels and blood. Its job is to deliver nutrients to the body and remove by-products
My ranking of the body system and why I ranked them the way I did. Cardiovascular system: the most important of the systems it consists of the heart, the spleen and the blood vessels that are spread throughout the body services all the cells and tissues of the body, its primary objective is to continually provide nutrients to the brain. So without the whole system fails. Nervous system: this system includes the brain, spinal cord and nerves as organs. It receives information from all the other body organs and then directs each organ how to operate as a team.
A drug administered systemically relies on the circulatory system to take it to the site of action and to other tissues in the body. After absorption into blood, most drugs must leave the bloodstream and enter the site of action to exert their effect. For a drug administered topically (nonsystemically), entry into or exit from the blood is not necessary. Topical drugs merely need to travel a short distance from the site of administration (i.e., the skin surface for dermal administration) to the site of action (i.e., dermis). However, it is possible for topical drugs to enter the systemic circulation and cause side effects.