HESI A&P Circulatory System
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Whole blood consists of approximately __% plasma and __% formed elements such as erythrocytes, leukocytes, and platelets.
Red Blood Cells
White Blood Cells
aka Thromobocytes, important for the clotting of blood.
All formed elements are derived from stem cells in ____ _____ ______.
Red Bone Marrow
Erythrocytes are modified for transport of ________.
Oxygen is bound to the pigmented protein_________.
White blood cells are active in _________ and ________ formation.
Which leukocytes are phagocytic?
Neutrophils and Monocytes
What leukocyte is responsible for antibody formation?
Platelets are active in the process of _____ _______.
Blood serves to :
- Transport oxygen & nutrients to blood cells
- To carry away carbon dioxide & metabolic wastes.
_______ contains approximately 10% proteins, ions, nutrients, waste products, and hormones, which are dissolved or suspended in water.
The ______ is a double pump that sends blood to the lungs for oxygenation through the _________ circuit and to the remainder of the body through the ________ circuit.
Circulation of blood through heart:
- Superior/Inferior Vena Cava
- Right Atrium
- Triscuspid Valve
- Right Ventricle
- Pulmonary Semi-Lunar Valve
- (Lungs) Obtains Oxygen
- Pulmonary Veins
- Left Atrium
- Biscuspid Valve
- Left Ventricle
- Aortic Semi-Lunar Valve
- All other body parts
Which heart areas contain OXYGENATED blood?
Which heart areas contain DEOXYGENATED blood?
The heart has an intrinsic beat initiated by the __________ node and transmitted along a conduction system through the myocardium.
measures the wave of electrical activity in the heart.
The ______ cycle is the period from the end of one ventricular contraction to the end of the next ventricular contraction.
the contraction phase of the cardiac cycle
The relaxation phase of the cardiac cycle
Arteries carry blood _____ from the heart.
Veins carry blood _____ the heart.
What is the function of the capillaries?
is where the exchanges take place between the blood and surrounding tissues, exchanging water, nutrients, and waste products.
The systemic arteries begin with the ______, which sends branches to all other parts of the body.
Arteries get ______ the further they get from the heart.
The smaller arteries are called...
The veins parallel the arteries and usually have the same ____.
The walls of the arteries are thick and ______, and they carry blood under ____ pressure.
Vasoconstriction and Vasodilation result from _______ & _______ of smooth muscle in the arterial walls. These changes influence the blood pressure and blood distribution to the tissues.
Contraction & Relaxation
The walls of veins are ______ and less elastic than those of the arteries, and carry blood blood under _______ pressures.
If the deflection of the ECG DOES NOT represent the systole and diastole of the heart chambers, then what does ECG represent?
It represents the electrical activity that precedes, comes before, the contraction-relaxation events of the myocardium.
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