Soc 15 The Structure Of The Heart Flashcards
What is the cardio-respiratory system?
The interaction of the heart and lungs to supply oxygen to muscles during exercise. Cardiovascular: to do with the
What is cardiovascular?
To do with the heart,blood and blood vessels together
What is Vasodilation?
When veins swell up or dilate; widening of the internal diameter (lumen) of the blood vessel to allow increased blood flow.
What is Vasoconstriction?
When shrink down; narrowing of the internal diameter (lumen) of the blood vessel to decrease blood flow.
What are the three main function of cardiovascular system?
Transport oxygen, carbon dioxide and nutrients
It helps clot blood
It control’s the body’s temperature
What is vascular shunting?
Your muscles need more oxygen for movement and so move away from the organs to the muscles
What are the 4 charecteristics of arteries?
Arteries take blood away from the heart
Arteries have thick walls and are more elastic than veins as they carry blood which is at a higher pressure than veins as they carry oxygenated blood
The channel the blood flows through, called the lumen, can widen to allow more blood through when you so that it can reach the working muscles
The pulmonary artery is different from other arteries as it carries deoxygenated blood from the heart to the lungs
What are the 4 charecteristics of veins?
Veins carry blood into the heart
Veins have much thinner walls, are less elastic and carry blood at a lower pressure
Veins contain many valves which helps deoxygenated blood flow to the heart
The pulmonary vein is different to other veins as it carries oxygenated blood from the lungs back to the heart
What are the 4 charecteristics of capillaries?
Capillaries are microscopic vessels - just one cell thick
At one end, capillaries carry oxygenated blood which transfers oxygen andnutrients to the muscles
At the other end, they carry deoxygenated blood into the veins, picking up wasteproducts and taking them around the body to dispose of them
Capillaries are where gaseous exchange takes place
What is the role of the pulmanory vein?
Brings deoxygenated blood from the lungs
What is the role of pulmonary artery?
The pulmonary artery carries deoxygenated vlodd to the lungs
What is the role of the vena carva?
Brings deoxygenated blood from the body
