erythocytes red platelets yellow Tlymphocyte light green COMPONENTS
- Slides: 19
(erythocytes = red; platelets = yellow; T-lymphocyte = light green)
COMPONENTS OF BLOOD (video) A. Plasma: 55 % of blood B. Formed Elements: 45% -- Erythrocytes (RED BLOOD CELLS) -- Leukocytes (WHITE BLOOD CELLS) -- Thrombocytes (PLATELETS)
FEATURE RED BLOOD CELLS WHITE BLOOD CELLS PLATELETS SHAPE Biconcave disc Variable, Amoeboid Tiny, Cell fragments FUNCTION Transport O 2 and CO 2 Combat infection Blood clotting ORIGIN Bone marrow Lymphoid Tissue Bone Marrow ALSO CALLED Erythrocytes Leukocytes Thrombocytes
Blood – Plasma – contains…. • Water - and dissolved in it… a lot of stuff – Blood proteins -Albumin - osmotic balance (liver) -Fibrinogen - blood clotting (liver) – Gases (O 2, CO 2) – Nutrients (fats, glucose, amino acids, nucleotides) – Wastes (urea, ammonia) – Vitamins – Hormones – Salts
Blood - Cells 1. RBC- most numerous • a biconcave disc - why? ? ? • Lack a nucleus • live for 120 days – why? ? • In the cell is Hemoglobin – which binds to oxygen – called oxyhemoglobin
Blood Cells 2. White Blood Cells • • largest in size contain nucleii Function: to fight infection Some are phagocytic
Blood Cells 3. Platelets • Very small & irregular in shape cell fragments • Function – blood clotting
All blood cells made in the bone marrow of the large bones.
Clotting
Blood Clotting Need three things in blood 1) Platelets 2) Prothrombin 3) Fibrinogen - Platelets clump at the site of the “leak” and partially close it then initiate a sequence of events to activate fibrinogen.
Clotting – produces an insoluble fiber – fibrin, requires calcium ions 1. Damaged vessel and platelets release prothrombin activator (an enzyme called thromboplastin) 2. (with Ca 2+) prothrombin activator enzymes catalyze the conversion of Prothrombin Thrombin 3. Thrombin activates Fibrinogen Fibrin 4. Fibrin has sticky ends and forms a lattice or network over the leak. Blood cells get trapped and form a clot.
RBC trapped in the FIBRIN network
Human Blood Types • Antigen – an agent that is foreign (or self) and is recognized by the immune system • Antibody – a Y shaped protein capable of identifying and binding to a specific antigen
Agglutination – Antibodies connect to the antigen of the pathogen and round up the infection in one area (a clump)
- Erythocytes
- Red orange purple
- Yellow bu
- Red green show
- Yellow black
- Next red orange yellow green blue purple
- Red orange yellow green blue indigo and violet
- Blue red orange blue green red
- Caterpillar confidential levels
- Red yellow green status definitions
- Red orange yellow green blue indigo violet
- Light light light chapter 23
- Light light light chapter 22
- Chapter 22
- Platelets are fragments of multinucleate cells called
- Ffp clotting factors
- Alpha granules of platelets
- Cryoprecipitate components
- Hemostasis definition
- Indication of transfusion