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Hum Phys: Blood
Transcript of Hum Phys: Blood
Components of Blood
Diseases of Red Blood Cells
What is the purpose of blood in the body?
Discuss with your neighbor...
Components of blood
What is blood?
Blood is the vehicle in the body in which the primary role is distribution.
What does blood distribute?
glucose, fatty acids, amino acids, vitamins
oxygen & carbon dioxide
steroids & thyroid hormone
urea & uric acid
Sorry Prezi won't let me record an introduction for this slide
Blood is slightly alkaline with a pH between 7.35 - 7.45
Blood accounts for 8% of your body weight and a healthy adult has between 5-6 liters of blood in the body.
Blood contains living cells as well as non-living material
Despite popular notion.....
Blood is always the color red and does not turn blue
So why do people think blood is blue??? look at your arm....
It is true that blood does change color based on oxygenation levels: oxygenated blood is bright red & deoxygenated blood is dull red.
Where does blood come from?
The clotting proteins found in blood are produced by the liver
Hormones are produced by the endocrine system stimulate blood production
Water component of blood is regulated by the hypothalamus (a gland in the body) & maintained by the kidneys
Types of anemia:
Sickle cell anemia
Blood platelets are irregularly shaped cell fragments
Blood platelets assist with the clotting process when tissue is damaged.
Platelets are the first step in coagulation and help to "plug" the wound as well as releases a chemical signal to attract more platelets and stimulate the clotting cascade.
Is this video true???
Can you have too many red blood cells???
Yes, it is a condition called polycythemia
This means that the % composition of your blood is not normal and there will be a decrease in the amount of plasma, white blood cells, & platelets circulating in the blood.
Do you think this is a serious medical condition???
What might cause polycythemia to occur?
Other components of blood:
It has to do with how your skin blocks light and little to do with the actual color of the blood
Blood cells are made in bone marrow
interesting video about sickle cell anemia
Non-living components of blood
Blood is a type of connective tissue.
When a woman is pregnant her blood supply increases by 25%-40%
red blood cells
white blood cells
Normal Platelet Count
Use this test to understand why someone might bleed or bruise easily
Some medication may increase risk of bleeding and platelet count is monitored
Fluid that transports blood cells and dissolved material in the blood
91% of plasma is water
7% is protein which is used to help with clotting or immune system responses
2% dissolved nutrients, ions, gasses, and chemical signals (hormone)
List the living and non-living components of blood
What is present in blood plasma?
List 4 things that blood does for the body
What kind of tissue is blood?
Textbook pages 338 - 345
Textbook pages 338-345