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Blood which is returning to the heart from the brain will enter the
Blood which is returning to the heart from the brain will enter the
which artery carries de-oxygenated blood?
which artery carries de-oxygenated blood?
although the heart beats rhythmically, the blood pressure in the arteries does not drop to zero between heart beats and the blood is kept in continuous motion. Which of the following best helps to explain these observations
although the heart beats rhythmically, the blood pressure in the arteries does not drop to zero between heart beats and the blood is kept in continuous motion. Which of the following best helps to explain these observations
a
a
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exchange of nutrients and waste material between the blood and the cells occurs through
exchange of nutrients and waste material between the blood and the cells occurs through
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a person suffering from a deficiency of RBC is unable to carry out prolonged vigorous physical exercise. main reason why?
a person suffering from a deficiency of RBC is unable to carry out prolonged vigorous physical exercise. main reason why?
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which of the following blood proteins is concerned with blood clotting
which of the following blood proteins is concerned with blood clotting
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which of these is found in the blood plasma but not in lymph
which of these is found in the blood plasma but not in lymph
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which of the following blood proteins is concerned with blood clotting
which of the following blood proteins is concerned with blood clotting
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which of the following are most important in the formation of a blood clot when a blood vessel is damaged
which of the following are most important in the formation of a blood clot when a blood vessel is damaged
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inflammation in the area of a wound, like a tear in the skin, is a useful reaction to the damage because:
inflammation in the area of a wound, like a tear in the skin, is a useful reaction to the damage because:
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the membrane which completely encloses and protects the heart
the membrane which completely encloses and protects the heart
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when heart muscles contract and relax respectively
when heart muscles contract and relax respectively
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blood flow from the heart to lungs and back to heart is the
blood flow from the heart to lungs and back to heart is the
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the instrument used to measure blood pressure is called
the instrument used to measure blood pressure is called
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erythrocytes have a relatively short life span bcs they
erythrocytes have a relatively short life span bcs they
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tissue fluid and blood plasma both exist outside cells therefore they are
tissue fluid and blood plasma both exist outside cells therefore they are
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the % of plasma in blood is approximately
the % of plasma in blood is approximately
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what is the function of atrioventricular valves?
what is the function of atrioventricular valves?
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whats the function of semilunar valves
whats the function of semilunar valves
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what causes the lub dub sound?
what causes the lub dub sound?
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why do veins have valves?
why do veins have valves?
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from the internal layer to external layer, label artery/vein
from the internal layer to external layer, label artery/vein
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which blood vessels make up the pulmonary circulation
which blood vessels make up the pulmonary circulation
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which blood vessels make up the systemic circulation
which blood vessels make up the systemic circulation
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whats the general function of RBC
whats the general function of RBC
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whats the general function of WBC
whats the general function of WBC
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whats the general function of platelets
whats the general function of platelets
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describe the function of the lymph vessel in the tissue
describe the function of the lymph vessel in the tissue
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name two features of organs in the circulatory system which a giraffe would have
name two features of organs in the circulatory system which a giraffe would have
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Study Notes
Blood Circulation and Anatomy
- Blood returning from the brain enters the superior vena cava for reoxygenation.
- Pulmonary arteries are responsible for carrying deoxygenated blood to the lungs.
- Blood pressure does not drop to zero during heartbeats due to the elastic recoil of artery walls and continuous blood flow.
Nutrient Exchange and Blood Components
- Exchange of nutrients and waste occurs through capillary walls, which are semi-permeable.
- An individual with RBC deficiency is unable to perform prolonged vigorous activity due to insufficient oxygen transport to tissues.
Blood Proteins and Clotting Mechanism
- Fibrinogen is the blood protein primarily involved in blood clotting.
- Platelets and fibrin are critical for blood clot formation when a vessel is damaged.
Inflammation and Heart Protection
- Inflammation at a wound site serves to contain damage, initiate healing, and prevent infection.
- The pericardium is the membrane that encloses and protects the heart.
Cardiac Function
- Heart muscles contract during systole and relax during diastole.
- The pulmonary circulation is the pathway of blood flow from the heart to the lungs and back.
- A sphygmomanometer is used to measure blood pressure.
Lifespan and Composition of Blood
- Erythrocytes (red blood cells) have a short lifespan due to lack of organelles for repair.
- Blood plasma constitutes about 55-60% of blood volume.
Valves and Cardiac Sounds
- Atrioventricular valves prevent backflow into the atria during ventricular contraction; semilunar valves prevent backflow into the ventricles from arteries.
- The "lub-dub" sound of the heart is caused by the closing of the heart valves during the cardiac cycle.
- Veins have valves to prevent the backflow of blood, especially in the extremities.
Circulatory Structures
- Pulmonary circulation includes the pulmonary arteries and pulmonary veins.
- Systemic circulation comprises all arteries and veins that supply the body.
Functions of Blood Components
- Red Blood Cells (RBCs) primarily transport oxygen and carbon dioxide.
- White Blood Cells (WBCs) are responsible for immune response and defense against pathogens.
- Platelets play a crucial role in blood clotting and wound healing.
Lymphatic System
- Lymph vessels transport excess tissue fluid back to the bloodstream and play a role in immune function.
Unique Features of Circulatory Systems in Giraffes
- Giraffes possess longer blood vessels to maintain blood pressure and valves to prevent pooling in limbs.
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Description
Test your knowledge on the pathway that blood takes when returning to the heart from the brain. Identify the specific blood vessels involved in this circulation.
