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Questions and Answers
What is the main function of blood in the human body?
What is the main function of blood in the human body?
- Producing heat for the body
- Recycling dead cells and tissues
- Storing vitamins and minerals
- Transporting nutrients, hormones, gases, and wastes (correct)
What percentage of blood volume does plasma constitute?
What percentage of blood volume does plasma constitute?
- 45%
- 55% (correct)
- 75%
- 25%
Which cells are primarily responsible for the production of plasma in adults?
Which cells are primarily responsible for the production of plasma in adults?
- Erythrocytes
- Reticuloendothelial cells in the liver (correct)
- Leukocytes
- Platelets
Which component makes up about 91% of blood plasma?
Which component makes up about 91% of blood plasma?
What is the approximate total blood volume in a normal healthy adult?
What is the approximate total blood volume in a normal healthy adult?
Flashcards
Blood's function
Blood's function
Blood transports nutrients, hormones, gases, and waste; regulates pH, temperature; and has immunological functions.
Blood components
Blood components
Blood consists of plasma, platelets, white blood cells, and red blood cells.
Plasma percentage in blood
Plasma percentage in blood
Plasma accounts for about 55% of the total blood volume.
Plasma composition
Plasma composition
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Plasma production in adults
Plasma production in adults
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Study Notes
Blood Composition and Function
- Blood is essential for human life, transporting nutrients, hormones, gases, and waste products.
- It also plays a crucial role in maintaining internal balance (homeostasis) of pH, temperature, and other conditions.
- Blood is composed of plasma, platelets, white blood cells (leukocytes), and red blood cells (erythrocytes).
Blood Volume
- An adult human has 4-5 liters of circulating blood.
- Blood constitutes 7-8% of an adult's total body weight.
- Plasma makes up approximately 55% of total blood volume.
- The remaining 45% comprises blood cells.
Blood Plasma
- Plasma is a light yellowish liquid forming the base of blood.
- It is mostly water (91%).
- Remaining 9% comprises solids like coagulation factors, proteins (albumin, globulins), electrolytes, and immunoglobulins.
Plasma Formation
- In embryos, plasma originates from mesenchymal cells.
- Albumin is produced first, followed by globulins and other plasma proteins.
- In adults, the liver's reticuloendothelial cells primarily produce plasma, supported by bone marrow and spleen.
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