blood and lymph blood plasma cells platelets lymphatic system
TRANSCRIPT
Blood and Lymph•Blood plasma• cells•Platelets•Lymphatic system
Blood
• Often labelled a tissue because:– Many cells
working together to perform a task
• White and red blood cells, plasma and platelets
• The body contains 4-6 liters of blood
• 55% of volume is plasma!– 45% is cells
Blood Plasma• Clear, pale yellow• mainly composed
of water– Also contains:
• blood proteins• inorganic electrolytes.
• Overall, 90% water–10% dissolved
gases, salts, nutrients, enzymes, proteins, hormones and waste products (phew)
Blood Cells• Red Blood Cells (AKA erythrocytes)– Transport
oxygen• Disc shaped
– Lots of surface area
– Squeeze through capillaries
• Contain hemoglobin
– No nucleus– 5,000,000 in 1ml
Blood Cells(continued)
• White blood cells (AKA leukocytes)– Attack intruders– #s increase with
infection in body– Several varieties– Contain nuclei– 1 WBC to 700 RBCs– Most live only a few days– Produced in white bone
marrow
Varieties of blood cells (FYI only)
Blood Types
• Uses of blood typing– Properties of blood help with:
• Paternity suits• Forensic science• Health problems
More on Erythrocytes• Contain antigens
– Which determine your blood type
• 4 types– A, B, AB and O– Kinda like gang
colors– Each blood type is
also + or –• Example blood types:
– Mr Taylor is B+– Mr McKechnie is
O-– Can also be AB+,
AB-, A+, A-, B- and O+
Blood type gang “weapons”• Gangs and their weapons
– A’s have anti B gats• AKA: B antibodies
– B’s have anti A gats• AKA: A antibodies
– AB’s have no gats• AKA: no antibodies
– O’s have anti everybody gats• AKA: A+B antibodies
• Each blood type is also Rh+ or Rh- positive or negative– Same system as blood types
The Blood Type hoods…– Neighbourhoods • (can receive blood from:)
– A hoods welcome A’s and O’s
– B’s welcome in B and O– AB’s welcome all– O’s don’t welcome
anyone
– Allowed into neighbourhoods
• (Donor for:)– A’s allowed into A and AB
hoods– B’s into B and AB hoods– AB’s into AB only– O’s into all
• Copy diagram
Transfusions…
• Antibodies present in the recipient must not match the antigens (blood type) of the donor.– Clumping will
occur.• Antibodies attach
to matching antigens
Click on top picture and scroll down to the “Blood typing” section and show the agglutination animation on the left.
Click on picture at right and the “Blood typing” game.
Platelets and Blood Clotting• Plasma proteins and
cell fragments• Platelets clot
– They stick to damaged blood vessels
– they release clotting factors (coagulate blood)
• Calcium and vitamin K aid in creating thrombin
• Thrombin is an enzyme that converts fibrinogen into sticky mass of fibrin (AKA a scab)
Lymphatic System• Network of
vessels that:1. removes extra
fluid and returns it to the Circ. Sys.
2. absorbs fats and fat soluble vitamins from intestines
3. Produces Immune cells• WBC’s and
antibodies
Lymphatic system (cont)• Lymph
– The fluid of the lymphatic system– Contains: lots of fat, fluid,
proteins, immune cells and wastes
• Lymph nodes– Filters lymph– Location of WBC production