when warming up for a sport the body gets warm.
The heart beats fast and the heart pumps more blood around the body.
Muscles starts to stretch because all the muscles are warm enough and you become more flexible
The veins and arteries ( Blood vessels) start to show on your skin, because they are under high pressure.
They do this at a constant speed until you stop. The cardiovascular system
This process happens really fast. Increased blood pressure- as the cardiovascular system works to deliver more oxygen and glucose to the muscles ( systolic pressure rises and diastolic pressure remains unchanged).
Re-distribution of blood flow( the vasoconstriction, narrowing) of
Wednesday 24 April 2013
Monday 22 April 2013
structure of the Cardiovascular System.
The heart is made up of four hallow chambers.The top two are atria and the bottom two are ventricles.The aria are the reception of the heart and receive the blood. The ventricle are the pumps of the heart which send the blood around the body or to the lungs. The heart is divided into two sides (right and left), each side
having an atrium and ventricle. The sides are divided by a septum.
• Right hand side
1. When the heart is relaxed, de-oxygenated
blood enters the heart via the venue cavae.
2. Blood enter the right atria.
3. The right atria contracts pushing blood
through the tricuspid valve into the right
ventricle.
4. The ventricle contracts and closes the
tricuspid valve forcing the blood out through
the semilunar valve into the pulmonary
artery to the lungs.
5. The heart relaxes and the semilunar valve
closes to stop back flow.
• Left Hand Side
1. When relaxed oxygenated blood from the
lungs enter via the pulmonary artery.
2. Blood enters the left atria.
3. The left atria contracts pushed blood into
the ventricle visa the bicuspid valve.
4. The left ventricle contracts and closes the
bicuspid valve, pushing the blood through
semilunar valve in the aorta to the rest of
the body.
5. The heart relaxes and the semilunar valve
closes to stop back flow.
having an atrium and ventricle. The sides are divided by a septum.
• Right hand side
1. When the heart is relaxed, de-oxygenatedblood enters the heart via the venue cavae.
2. Blood enter the right atria.
3. The right atria contracts pushing blood
through the tricuspid valve into the right
ventricle.
4. The ventricle contracts and closes the
tricuspid valve forcing the blood out through
the semilunar valve into the pulmonary
artery to the lungs.
5. The heart relaxes and the semilunar valvecloses to stop back flow.
• Left Hand Side
1. When relaxed oxygenated blood from the
lungs enter via the pulmonary artery.
2. Blood enters the left atria.
3. The left atria contracts pushed blood into
the ventricle visa the bicuspid valve.
4. The left ventricle contracts and closes the
bicuspid valve, pushing the blood through
semilunar valve in the aorta to the rest of
the body.
5. The heart relaxes and the semilunar valve
closes to stop back flow.
function of the cardiovascular system.
There are 5 different blood vessels in your body.
1) Arteries and Arterioles.
Arteries and Arterioles are similar to each other. They both take blood away from the heart under extreme pressure. for the Arteries and Arterioles to survive the pressure they have a thick layer of muscle. They're elastic, because they need to expand to deal with the high pressure. Arterioles are small version of Arteries, Arterioles still have the same structure as Arteries.
2) Capillaries.
Capillaries are so small. They are only one cell thick. In the capillaries the exchange of gasses and waste products takes place. They turn waste into urine. Oxygen gets off and C02 gets in. They're only one cell thick to allow for an easy exchange.
3) Veins and Venules.
These vessels carry blood back to the heart under low pressure. they're muscle layer is thin, because for them to have large lumin. The large lumin allows blood to flow with as little resistance as possible. They contain valve, because to prevent back flow.
Arteries are away from your heart and veins are to your heart. Arteries take blood away from the heart and the capillaries put oxygen on to it, after the veins take it to the heart to pump it and it starts again.
1) Arteries and Arterioles.
Arteries and Arterioles are similar to each other. They both take blood away from the heart under extreme pressure. for the Arteries and Arterioles to survive the pressure they have a thick layer of muscle. They're elastic, because they need to expand to deal with the high pressure. Arterioles are small version of Arteries, Arterioles still have the same structure as Arteries.
2) Capillaries.
Capillaries are so small. They are only one cell thick. In the capillaries the exchange of gasses and waste products takes place. They turn waste into urine. Oxygen gets off and C02 gets in. They're only one cell thick to allow for an easy exchange.
3) Veins and Venules.
These vessels carry blood back to the heart under low pressure. they're muscle layer is thin, because for them to have large lumin. The large lumin allows blood to flow with as little resistance as possible. They contain valve, because to prevent back flow.
Arteries are away from your heart and veins are to your heart. Arteries take blood away from the heart and the capillaries put oxygen on to it, after the veins take it to the heart to pump it and it starts again.
Short term effects of Musculoskeletal system.
• Increased range of Joint
mobility. The range of joint mobility increased, because they get warmer and can stretch further and the mobility increases.Muscles and tissues warm-up and they become like elastic. if the muscles don't get warm they will rip when you start performing.
• Fibres tear as muscles
work. Micro tears in muscle fibres and they recover in bigger size and stronger. The muscles tear, because if the muscle can't pick the weight up it will tear apart. If lots tear at the same time will lead to muscle injury. Muscle Hypertrophy happens when you lift heavy weight, Muscle Tears and it repairs itself, after the Fibres thicken and the muscles increase in size, also they'll be an increased joint range of movement due to increase in blood flow and increased muscle temperature.
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