blood adapted from biologycorner
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BLOOD adapted from www.biologycorner.com. Functions of Blood. Transportation Defense against disease. Function: Transportation. Blood transports oxygen from the respiratory system to each cell Blood transports nutrients from the digestive system to each cell. - PowerPoint PPT PresentationTRANSCRIPT
BLOOD adapted from www.biologycorner.com
Functions of Blood
• Transportation
• Defense against disease
.
Function: Transportation
• Blood transports oxygen from the respiratory system to each cell
• Blood transports nutrients from the digestive system to each cell
Function: Transportation
Blood carries waste from cells to excretory organs
carbon dioxide goes from cells to the lungs
Other waste products go to kidneys
Function: Defense against disease• White blood cells help to combat
disease
• http://www.youtube.com/watch?v=KxTYyNEbVU4
• http://www.youtube.com/watch?v=Z_mXDvZQ6dU
Function: Defense against disease
• Carries antibodies to fight disease
Blood and Blood CellsBlood is a type of CONNECTIVE TISSUE
It has two basic components:
• CELLS (rbc, wbc, platelets) = 45%
• Plasma (water, proteins, waste, carbon dioxide, oxygen, hormones, enzymes, etc) = 55%
Three Types of Blood Cells
red blood cells (erythrocytes)
white blood cells (leukocytes)
platelets (thrombocytes)
Erythrocytes• Contain hemoglobin• Formed in red bone
marrow• Transport oxygen
and carbon dioxide
What do you suppose happens to your body when the erythrocyte count is too low?
Anemia
• What do you suppose happens to your body when the erythrocyte count is too high?
It is a myth that deoxygenated blood appears blue.
The blood on the left is oxygenated, the right is deoxygenated blood (from a vein) Blood is never never blue.
Source: Wikipedia Commons
WHITE BLOOD CELLS
(Leukocytes)●Formed in red bone marrow or in lymph
tissue
●Destroy invading organisms
• What do you suppose happens to your body when the leukocyte count is too low?
Difficult to fight infection
What do you suppose is happening to your body when the leukocyte count is high?
• You may be fighting an infection
• If the count is extremely high or low this can indicate leukemia
• There are FIVE different kinds of WBCs
Neutrophil
(nucleus has several lobes)
Active phagocytes
60% of WBC
Present in the pus of
wounds
BasophilProduces
Heparin and
Histamines
Important in
Inflammatory
Reaction
1% WBC
Eosinophil
Mainly
attack
parasites
2% WBC
Monocyte
(larger cell, horseshoe shaped nucleus)
Become
macro-
phages
Lymphocyte(nucleus is dark and takes up almost
whole cell; almost no cytoplasm seen)
Defense
against
invaders
Yield
Antibodies
30% WBC
Left: Lymphoctye | Right: Neutrophil
Platelets (thrombocytes)
• Tiny fragments of bone
marrow cells (not an
actual cell)• Help form blood clots
and help repair blood
vessels
• What do you suppose can happen to your body when thrombocyte count is too low?
Clotting is impaired
THROMBUS – blood clot (abnormal)
EMBOLUS – when the clot moves to another place.
What is DVT? Video: Deep Vein Thrombosishttp://www.youtube.com/watch?src_vid=gGrDAGN5pC0&annotation_id=annotation_115462&feature=iv&v=uS1RGbW8UbQ What is a Pulmonary Embolism?