blood
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16 Terms
What are the three primary functions of blood?
Transport, Regulation, Protection.
Transport
The function of blood that carries oxygen from the lungs to tissues and removes carbon dioxide.
Regulation
The function of blood that maintains body temperature, pH balance, and fluid balance.
Protection
The function of blood that involves clotting mechanisms and immune defenses.
What does blood transport?
Oxygen, carbon dioxide, nutrients, hormones, and metabolic wastes.
Plasma
The fluid matrix of blood, making up about 55% of its volume.
Formed elements
Components of blood including red blood cells (RBCs), white blood cells (WBCs), and platelets, making up about 45% of its volume.
Color of oxygen-rich blood
Scarlet.
Color of oxygen-poor blood
Dark red.
Viscosity of blood
Thicker than water, sticky due to red blood cells.
pH of blood
Slightly alkaline, ranging from 7.35 to 7.45.
Average blood volume in adult
About 5 liters.
Body temperature of blood
Approximately 38°C (100.4°F).
What percentage of body weight does blood account for?
About 8%.
Clotting mechanisms
Prevent blood loss after vessel injury.
Immune defenses
White blood cells, antibodies, and complement proteins fight infection.
Flashcards (24)