lesson 14

Question 1

circulatory system

Answer 1

-single celled organisms
-multi cellular organisms

Question 2

circulatory system

Answer 2

-transportation
-regulation
-protection

Question 3

composition of blood-formed elements

Answer 3

-plasma
-erythrocytes (hemoglobin)
-leukocytes
-platelets

Question 4

stem cells and the production of formed elements

Answer 4

-pluripotent stem cells
-hematopoiesis
-erythropoietin (EPO)
-erythropoiesis

Question 5

types of circulatory systems

Answer 5

NO circulatory system:
sponge
hydra
nematode
OPEN circulation:
grasshopper
CLOSED circulation
earthworm
heart

Question 6

fish heart and circulation

Answer 6

2 pumping chambers
low blood pressure past gills

Question 7

amphibian heart and circulation

Answer 7

3 chambered heart
potential for mixing

Question 8

reptile circulation

Answer 8

-septum
=incomplete in most
=complete in crocodiles

Question 9

heart contraction

Answer 9

cardiac cycle order:
-sinoatrial node impulse
-atria beat
-atrioventricular node impulse
-purkinje fibers conduct signal through septum
-ventricles beat

Question 10

capillaries

Answer 10

-oxygen, nutrient, carbon dioxide and wast transfer
-regulate heat exchange via vasoconstriction and vasodilation