9 Questions
What is the percentage of plasma in blood composition?
55%
What is the primary function of red blood cells?
Carrying oxygen from lungs to body tissues
What is the lifespan of a red blood cell?
120 days
What is the primary function of white blood cells?
Defense against infection and disease
What is the primary function of platelets?
Blood clotting and hemostasis
What is the composition of lymph?
Water, proteins, fats, waste products, immune cells
What is the function of the lymphatic system?
Defense against infection and disease, absorption of fats and fat-soluble vitamins
What is the characteristic shape of red blood cells?
Biconcave disk
What is the function of the spleen in the lymphatic system?
Filtering out old or damaged red blood cells
Study Notes
Blood
- Composition:
- Plasma (55%): water, proteins, nutrients, hormones, gases, waste products
- Formed elements (45%): red blood cells, white blood cells, platelets
- Functions:
- Transport of oxygen and carbon dioxide
- Regulation of body temperature
- Transport of nutrients and hormones
- Removal of waste products
- Maintenance of acid-base balance
- Defense against infection and disease
Red Blood Cells (Erythrocytes)
- Produced in: red bone marrow
- Lifespan: approximately 120 days
- Functions:
- Carrying oxygen from lungs to body tissues
- Carrying carbon dioxide from body tissues to lungs
- Characteristics:
- Biconcave disk shape
- No nucleus
- Contain hemoglobin
White Blood Cells (Leukocytes)
- Produced in: red bone marrow
- Functions:
- Defense against infection and disease
- Phagocytosis (engulfing and destroying foreign substances)
- Types:
- Granulocytes (neutrophils, eosinophils, basophils)
- Agranulocytes (lymphocytes, monocytes)
Platelets (Thrombocytes)
- Produced in: red bone marrow
- Functions:
- Blood clotting
- Hemostasis
- Characteristics:
- Small, irregular shape
- No nucleus
Lymph
- Composition:
- Water
- Proteins
- Fats
- Waste products
- Immune cells (lymphocytes)
- Functions:
- Defense against infection and disease
- Absorption of fats and fat-soluble vitamins
- Removal of waste products
- Transportation of immune cells
- Circulation:
- Lymphatic vessels
- Lymph nodes
- Spleen
- Thymus
Blood Composition
- Plasma makes up 55% of blood, consisting of water, proteins, nutrients, hormones, gases, and waste products
- Formed elements make up 45% of blood, comprising red blood cells, white blood cells, and platelets
Blood Functions
- Transports oxygen and carbon dioxide
- Regulates body temperature
- Transports nutrients and hormones
- Removes waste products
- Maintains acid-base balance
- Defends against infection and disease
Red Blood Cells (Erythrocytes)
- Produced in red bone marrow
- Lifespan: approximately 120 days
- Carries oxygen from lungs to body tissues
- Carries carbon dioxide from body tissues to lungs
- Has a biconcave disk shape
- Has no nucleus
- Contains hemoglobin
White Blood Cells (Leukocytes)
- Produced in red bone marrow
- Defends against infection and disease
- Engulfs and destroys foreign substances through phagocytosis
- Types include granulocytes (neutrophils, eosinophils, basophils) and agranulocytes (lymphocytes, monocytes)
Platelets (Thrombocytes)
- Produced in red bone marrow
- Enables blood clotting
- Maintains hemostasis
- Has a small, irregular shape
- Has no nucleus
Lymph
- Comprises water, proteins, fats, waste products, and immune cells (lymphocytes)
- Defends against infection and disease
- Absorbs fats and fat-soluble vitamins
- Removes waste products
- Transports immune cells
- Circulates through lymphatic vessels, lymph nodes, spleen, and thymus
This quiz covers the composition of blood, including plasma and formed elements, and the various functions of blood in the body, such as oxygen transport and waste removal. Test your knowledge of blood and its role in the body.
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