Components:
- i) plasma
ii) erythrocytes (red blood cells)
iii) leukocytes (white blood cells)
iv) platelets
Plasma:
o 55% of blood volume and is 90% water
o Contains dissolved materials which are being transported:
o proteins (fibrinogen), hormones, nutrients, waste products, gases
Erythrocytes:
o Function: > to carry oxygen
o Structure: > no nucleus, cytoplasm contains mostly hemoglobin molecules
o biconcave shape; allows for flexibility and movement through vessels of different shapes and sizes
Hemoglobin
Complex protein molecule made up of four protein chains, with an iron at the core of each chain
o iron is the key component of hemoglobin that binds oxygen
o Other info: are constantly being destroyed and replaced
o because no nucleus, have a lifespan of about 4 months (120 days)
o two million cells are destroyed every second
Leucocytes:
o Function: help defend the body from disease and infection
o Structure: amoeboid-shaped cells destroy and consume invading bacteria and damaged body cells
Plateletes:
o Function: > assist in blood clotting process
o cell fragments that have broken off from special cells in the bone marrow
o Clotting i) when platelets encounter damaged blood vessels, they break open and release chemicals called clotting factors into the blood
• ii) factors help platelets to stick together to from a platelet plug
• iii) blood proteins then form fibrin molecules around the platelet plug
• iv) fibrin molecules form a mesh trapping blood cells and prevent them from passing through the damaged blood vessel
Other info:
o erythrocytes, leukocytes and platelets are manufactured in the bone marrow
o cellular components of blood make up 45% of the blood volume
o red blood cells are the most abundant cells in the blood (for every white blood cell in the blood there is 1000 red blood cells)
Anemia:
o when there is a decreased amount of hemoglobin in the blood
o can be caused by: i) blood loss
ii) too few red blood cells being produced
iii) reduced amounts of hemoglobin molecules in red blood cells
Shock:
o when circulatory system can not meet the nutritional needs of vital organs
o if nutritional needs of vital organs can not be met, the organs will shut down
Components: i) plasma
- ii) erythrocytes (red blood cells)
iii) leukocytes (white blood cells)
- iv) platelets
Plasma:
- 55% of blood volume and is 90% water
- Contains dissolved materials which are being transported:
- proteins (fibrinogen), hormones, nutrients, waste products, gases
Erythrocytes:
Function: to carry oxygen
Structure: no nucleus, cytoplasm contains mostly hemoglobin molecules
biconcave shape; allows for flexibility and movement through vessels of different shapes and sizes
Hemoglobin: complex protein molecule made up of four protein chains, with an iron at the core of each chain
iron is the key component of hemoglobin that binds oxygen
Other info: are constantly being destroyed and replaced
- because no nucleus, have a lifespan of about 4 months (120 days)
- two million cells are destroyed every second
Leukocytes:
Function: help defend the body from disease and infection
Structure: amoeboid-shaped cells destroy and consume invading bacteria and damaged body cells
Platelets:
Function: assist in blood clotting process
cell fragments that have broken off from special cells in the bone marrow
Clotting i) when platelets encounter damaged blood vessels, they break open and release chemicals called clotting factors into the blood
- ii) factors help platelets to stick together to from a platelet plug
iii) blood proteins then form fibrin molecules around the platelet plug
- iv) fibrin molecules form a mesh trapping blood cells and prevent them from passing through the damaged blood vessel
Other info:
erythrocytes, leukocytes and platelets are manufactured in the bone marrow
cellular components of blood make up 45% of the blood volume
red blood cells are the most abundant cells in the blood (for every white blood cell in the blood there is 1000 red blood cells)
Anemia:
when there is a decreased amount of hemoglobin in the blood can be caused by:
- i) blood loss
- ii) too few red blood cells being produced
- iii) reduced amounts of hemoglobin molecules in red blood cells
Shock:
when circulatory system can not meet the nutritional needs of vital organs if nutritional needs of vital organs can not be met, the organs will shut down
About some problems of physics