Formed Elements

Question 1

Erythrocytes (RBC)

Answer 1

CD235a
Biconcave, anuclear
transport O2 and CO2
4.2-6 million, 100-120 days

Question 2

Thrombocytes (platelets)

Answer 2

CD41, CD61, CD62
Fragments, anuclear
Thrombosis
150,000-500,000, 10 days

Question 3

Megakaryocyte

Answer 3

Large multinucleate
Precursor of platelets

Question 4

Neutrophils

Answer 4

AKA PMNS
CD66
Multilobed nucleus
Phagocytosis, intracellular killing with enzymes (O2 dependent or independent)
60%, 7-10 hr in blood, 3 days in tissue

Question 5

Eosinophil

Answer 5

Bilobed nucleus, pink
Anti-parasite and extracellular killing
Around 4%, 18 hrs in blood, <2 weeks in tissue

Question 6

Basophil

Answer 6

Bilobed nucleus
Allergies and anaphylaxis, bind IgE
1-2 years, <1%

Question 7

Mast cells

Answer 7

Many granules
Allergies and anaphylaxis, bind IgE
60 hrs

Question 8

Monocyte

Answer 8

CD14, CD33
8%, few days in blood
Become macrophage (in tissue) or DC
Kidney shaped nucleus

Question 9

Macrophages

Answer 9

CD11c
Big eaters
(mononuclear phagocyte)
Last weeks in tissue

Question 10

DC

Answer 10

CD11c
Antigen presenting cell
(mononuclear phagocyte)

Question 11

Lymphocytes

Answer 11

27% WBCs, length varies
Adaptive immunity