Cardiovascular system- The cardiovascular system is sometimes called the blood-vascular, or the circulatory, system. It consists of the heart, which is a muscular pumping device, and a closed system of vessels called arteries, veins, and capillaries
Pulse- Your pulse is your heart rate, or the number of times your heart beats in one minute.
Heart- The heart which is shaped like an upside down pear is located under the rib cage, to the left of the breastbone and between the lungs.
Why do we need blood to be pumped around the body? The purpose of your heart is to pump blood to the organs and tissues of your body that need the oxygen and nutrients it carries.
Blood pressure- As the blood moves, it pushes against the sides of the blood vessels. The strength of this pushing is your blood pressure. If your blood pressure is too high, it puts extra strain on your arteries and this may lead to heart attacks and strokes.
Why does your pulse increase when you exercise? When you are exercising, your muscles need extra oxygen some three times as much as resting muscles. This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing.
Cardiovascular system- The cardiovascular system is sometimes called the blood-vascular, or the circulatory, system. It consists of the heart, which is a muscular pumping device, and a closed system of vessels called arteries, veins, and capillaries
Great work Daisy! This will help with your last 2 science worksheets too :)
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