Functions and Composition of Blood

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Questions and Answers

What is the primary function of blood related to temperature?

Protection against infections
Distribution of nutrients
Regulation of body temperature (correct)
Transport of oxygen

Blood is composed of 45% plasma and 55% cellular components.

False (B)

What are the main components of blood?

Plasma, red blood cells, white blood cells, and platelets.

Blood is primarily composed of _____, which makes up about 55% of its volume.

<p>plasma</p> Signup and view all the answers

Match the blood component with its primary role:

<p>Plasma = Transport nutrients and waste Red Blood Cells = Transport oxygen White Blood Cells = Fight infections Platelets = Blood clotting</p> Signup and view all the answers

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Study Notes

Functions of Blood

Distribution of nutrients, oxygen, hormones, and waste products throughout the body
Regulation of body temperature, pH levels, and fluid balance
Protection against blood loss through clotting and infection via immune response

Blood Volume and Composition

Total blood volume varies by individual; generally around 5-6 liters for an adult male and 4-5 liters for an adult female
Normal blood pH ranges from 7.35 to 7.45, essential for enzymatic functions
Average blood temperature is approximately 38°C (100.4°F), slightly warmer than normal body temperature

Blood Components

Plasma constitutes about 55% of total blood volume
Major constituents of plasma include:
- Water (about 90% of plasma volume)
- Plasma proteins such as albumin, globulins, and fibrinogen, which play roles in osmotic balance, immune function, and blood clotting
- Various dissolved substances, including electrolytes, nutrients, gases, and wastes