Soc 15 Flashcards
(13 cards)
What is the cardiovascular system formed by
- Heart
- Blood Vessels
What does Cardio mean?
The heart
What does Vascular mean?
Means blood vessles
What are the 3 main functions of the cardiovascular system?
- Transport oxygen, carbon dioxide and nutrients
- It helps clot blood
- It controls the body’s temperature
How does transporting oxygen, carbon dioxide and nutrients affect the cardiovascular system?
The heart pumps oxygen around the body, which is used in respiration and the production of energy in the cells.
Why is blood clotting good for the cardiovascular system?
Blood contains platelets which help clots our blood and form scabs which help stop bleeding and healing. In some sports small cuts are common and so this is important.
Why is controlling the body’s temperature good for the cardiovascular system?
If you get too hot the blood vessels close to the skin get bigger (VASODILATION). Blood is diverted to the surface to allow more heat to radiate out. If you become too cold your vessels get smaller (VASOCONTRICTION) to avoid heat being lost.
What is Vasodilation?
If you get too hot, the blood vessels close to the skin get bigger. Blood is diverted to the surface to allow more heat to radiate out
What is Vasoconstriction?
If you become too cold your vessels get smaller to avoid heat being lost
What is vascular shunting?
Process that increases blood flow to active areas during exercise by diverting blood away from inactive areas; achieved by vasodilation and vasoconstriction
What hormone does your body release during exercise?
Your body releases adrenaline. This makes the heart beat faster and diverts blood away from organs to the muscles.
What are the symptoms of overheating (hyperthermia)?
- Feeling faint/dizzy
- Sweating heavily
- Raised body temperature
- Decreases blood flow around the body
- Reduction of apetite
What are the symptoms are being too cold (hypothermia)?
- Increased muscle stiffness
- Shivering
- Pale, cold, dry skin
- Slow breathing
- Tiredness or confusion
