blood, topic 3

Question 1

where do arteries carry blood?

Answer 1

away from the heart

Question 2

what kindve blood are arteries filled with?

Answer 2

oxygenated blood with the exception of pulmonary artery

Question 3

what happens when artery branches get smaller?

Answer 3

they get called arterioles

Question 4

what is the diameter of an artery?

Answer 4

small and hallow

Question 5

do arteries have valves?

Answer 5

no

Question 6

why are arteries thick walled and elastic?

Answer 6

to withstand high pressure from muscular push from the heart

Question 7

what happens to arteries when blood comes through?

Answer 7

they bulge out, this is used to measure pulse

Question 8

where do veins carry blood?

Answer 8

to the heart

Question 9

what kindve blood do veins carry?

Answer 9

deoxygenated with the exception of the pulmnary vein

Question 10

what is the diameter of veins?

Answer 10

large and hallow

Question 11

how is cirulation in veins aided?

Answer 11

by muscle contractions

Question 12

why do veins have valves in low pressure?

Answer 12

to keep blood from flowing backwards

Question 13

what are capillaries?

Answer 13

tiny blood vessels where food, oxygen and wastes are exchanged with the cells of the body

Question 14

does every cell sit beside a capillary?

Answer 14

yes

Question 15

how tick are capillary walls?

Answer 15

one cell thick fro easy exhange through diffusion

Question 16

how many layers are the walls of arteries?

Answer 16

3 layers of cells

Question 17

how much blood does an adult female and male have?

Answer 17

male, 5-6
female, 4-5

Question 18

where is blood made?

Answer 18

bone marrow by cell divison

Question 19

when does anemia occur?

Answer 19

when you have few red blood cells (RBC)

Question 20

do RBC have a nucleus?

Answer 20

no

Question 21

what is the lifespan of a RBC?

Answer 21

120 days

Question 22

what do RBC’s do?

Answer 22

carry oxygen using hemoglobin

Question 23

what is leukemia?

Answer 23

a blood cancer that affects white blood cells

Question 24

what is the smallest blood component called?

Answer 24

platelets (thrombocytes)

Question 25

what is hemophilia?

Answer 25

lack of clotting factors

Question 26

what is plasma?

Answer 26

-liquid portion of blood
-mostly water
-carries blood cells and platelets
-carries dissolved ions, nutrients, enzymes and other substances

Question 27

how is platelets blood created?

Answer 27

by fragments of larger cells in bone marrow that breaks apart

Question 28

what happens to platelets when you get an injury?

Answer 28

the platelets break open and a chemical reaction is triggered, producing fibrin.