The blood consists of two major portions: blood cells and plasma. The functions of the cardiovascular system: the cardiovascular system is so important to our body, that if it stops for a minute, rapid death will occur. The flow of blood is necessary for existence of life. If the flow of blood stopped, life will stop. Cardiovascular system has three main functions: Transport of nutrients, oxygen and hormones to cells throughout our body and removal of metabolic wastes such as (carbon dioxide and nitrogenous wastes).
Blood is then carried back to the heart through the venules and then followed by the veins. Blood provides the fluid environment for the body’s cells and it is transported in specialised tubes called blood vessels. The heart acts like a pump, which keeps the blood circulating around the body in a constant circuit. This system consists of the heart, blood vessels, blood, lymphatic and lymph. The main functions of the blood are to transport, defence, regulation and clotting.
Although there a small amount of cases of Alzheimer’s and frontotemporal dementia can be inherited from a previous generation. Vascular dementia is where the blood supply to the brain is interrupted, if there is restricted or stopped blood supply to the brain that’s when the cells being to die which results in brain damage. * Alzheimer’s disease Alzheimer’s is the most common form of dementia, this form of the disease is the loss of cells in brain which causes the brain to shrink. The medical term for this is ‘Atrophy’. The most affected part of the brain is the Cerebral Cortex; this part
Congestive Heart Failure Congestive Heart Failure is a condition in which the heart is unable to supply enough blood to the rest of the body. This is also known as CHF. When CHF occurs, the heart loses the ability to provide enough blood flow to the brain, liver, and the kidneys. Heart failure may be due to either the right, left or both ventricles. The heart does have four chambers to it.
This affects your circulatory system which includes your heart, kidney, and your brain. When having hypertension or high blood pressure your blood is not circulating the way it should be and that is what causes a person’s diagnosis. The feedback system cannot maintain homeostasis because there is no control over the causes of hypertension/high blood pressure. Once the causes can be controlled then the feedback system will be able to control the homeostasis. The consequences of not maintaining homeostasis balance may be being admitted to the hospital, a heart attack, stroke, aneurism, and possibly could lead to dying.
The other two chambers are pumping chambers called the right and left ventricle. The efficiency in the cycle of blood depends on the sequential contraction of the atriums and ventricles. Whenever the atriums contract this is called the systolic phase and whenever the ventricles contract this is called the diastolic phase. These contractions ensure the regular flow of blood through the heart. The contractions occur one after another to make a heartbeat.
Alzheimer’s disease Alzheimer’s disease is the most common form of dementia and accounts for between 50 and 70 per cent of all cases. It is a progressive degenerative illness that attacks the brain. As brain cells shrink or disappear, abnormal material builds up as ‘tangles’ in the centre of the cells and ‘plaques’ form outside the cells. These disrupt messages within the brain, damaging connections between brain cells. The cells eventually die and this means that information cannot be recalled or assimilated.
Like other body parts, the heart needs oxygen in order to grow and develop properly. It’s responsible for circulating blood, oxygen and nutrients around the body. The wall of the heart is made up of three layers: The Endocardium – is the inner layer of the heart wall. The Myocardium – is the middle layer of the heart and it’s made up of the cardiac muscle. The Pericardium – is the outer layer of the heart.
Outcome 1 Know what a stroke is 1.1 Identify the changes in the brain associated with stroke Heart attacks and strokes are usually due to cardiovascular disease, a condition featuring body-wide damage to the delicate lining of the arteries the tubes that carry oxygen and nutrient-rich blood to all the organs, tissues and cells in your body and to the brain. The psychological, behavioural and emotional changes that take place after a stroke are part caused by physical damage to the brain. When the brain cells are damaged the sensations and parts of the body controlled by the cells can no longer function properly. This usually affects the left hand side of the body. But I personally have seen someone who has had a stroke and it has
Stroke Questions 1) What happens to the body as a stroke occurs? A stroke is when the flow of blood to the brain stops. A stroke causes damage to the brain and brain cells in the immediate area which then begin to die because they are not getting the oxygen and nutrients they need to survive. 2) Name three different types of Stroke? Ischaemic stroke, which is caused by a blood clot that blocks a blood vessel or artery in the brain.