Circulatory System Flashcards
What is another name for Circulatory system?
Transport System
What is Circulatory system?
It is the movement of metabolic materials from where they are produced to where they are used, stores & eliminated.
What is the need for Transportation
•Distribution of nutrients
•Elimination of waste
•Distribution of hormones
•Distribution of respiratory gases
Medium of Transportation
•Cytoplasm
•Blood
What are some methods of Transportation?
•Diffusion
•Osmosis
•Transpirational pull
•Active transport
Humans transport system is through what?
Blood & Lymphatic system
How many litres of blood does the adult body contain?
4-5 litres
Blood flows through what?
Vessels
Blood vessels
•Arteries
•Veins
•Capillaries
Functions of blood
•Delivers O2 to throughout the body
•Transports nutrient absorbed by the GI tract
•Protects the body from infection
•Maintains body temperature and chemical balance
Contents of blood
•Plasma 55%
•White blood cells and Platelets 4%
•Red blood cells 41%
Erythrocytes are?
Red blood cells
Leukocytes are?
White blood cells
Thrombocytes are?
Platelets
What are Blood Cells?
Blood cells are the cellular components of blood, each with specific functions.
What is Haemoglobin?
It is a protein that facilitates transport of oxygen and carbon dioxide in the body.
What is the lifespan of RBCs?
approx. 120 days
What blood cell is responsible for immune defense and in responses?
White Blood Cells
What is the life span of WBCs?
Varies; few hours, days or years
Which white blood cell can live for years?
Memory Lymphocytes
What facilitates the blood clotting to prevent excess bleeding?
Platelets
What is the lifespan of Platelets?
7-10 days
Old or damaged platelets are removed by what?
The Spleen
