Blood Circulation Flashcards Preview

HAP1 Mid Sem - LO3 - Proccesses > Blood Circulation > Flashcards

Flashcards in Blood Circulation Deck (22):
1

Haemeglobin

Carries O2 and CO2
Heme = O2
Globin = CO2

2

RBC production stimulis - 3 types

1. Decreased RBC count
2. Decreased amount of haemeglobin
3. Decreased O2

3

RBC production - 5 steps

1. Low blood O2 carrying ability
2. Kidney releases erythropoietin
3. Erythropoietin stimulates red bone marrow
4. Enhanced erythropoietin increases RBC count
5. O2 blood carrying ability increases

4

RBC death - 4 steps

1. After 120 days RBC gets stuck in spleen and liver
2. Haemeglobin is broken into heme and globin
3. Heme is broken into iron which is stored and reused
4. Globin is broken down and reused

5

Neutrophils

Phagocytic - first to arrive at acute infection
Engulf bacteria and die
B and T cells

6

Monocytes

Phagocytes especially active in chronic infections
Engulf bacteria and survive
Antigen presenting cells

7

Eosinophils

Destroy worms
Destroy antigens
Lessen inflammation severity

8

Basophils

Stimulate inflammation by releasing histamine
Secrete heparin

9

Platelets

Aid blood clotting by forming temporary plug before clot can form

10

Systemic Circulation - 3 steps

Blood leaves left ventricle, carries oxygenated blood to capillaries and tissues, returns deoxygenated blood to right atrium

11

Pulmonary Circulation - 3 steps

Blood leaves right ventricle, carries deoxygenated blood to the lungs, returns oxygenated blood from lungs to heart

12

Lymphatic Circulation

Fluid that is forced out of bloodstream during normal circulation is filtered through lymph nodes, then transported back to blood stream via lymph vessels

13

Arteries

Carry blood away from the heart

14

Capillaries

Destination of transported substances
Site of tissue - blood exchange

15

Veins

Carry blood towards heart

16

Arterioles

Carry blood into capillaries
Diameter changes resistance of blood flow

17

Venules

Joint capillaries which connect to veins

18

Lymphatic Capillaries - 3 functions

1. Return excess fluid to blood
2. Return leaked protein to blood
3. Carry fat from intestine to blood

19

Formation of tissue fluid - 5 steps

1. Fluid forced out of blood
2. Most is reabsorbed
3. Some fluid left in between tissues
4. IF fluid and plasma proteins enter lymph capillary
5. Returned to blood

20

Lymph Nodes

Filters lymph before returned to blood
Contains lymphocytes and macrophages

21

Inflammatory Response - 4 steps

1. Increased blood flow to damaged area
2. Increase in WBC to damage area
3. Brings clotting proteins to area
4. Disposes of cell debris and pathogens by phagocytes

22

4 Cardinal signs

1. Redness
2. Heat
3. Pain
4. Swelling