1. 1.
2.
Acts as vehicle
-the blood is important for transport of nutrient,
respiratory gases, waste product from tissue and cells,
and also transport hormones and enzymes to the target
organs or cells.
Blood clotting
-An important part of homeostasis, where a damaged
vessel wall is covered by a platelet and fibrin to stop
bleeding.
2. 3.
4.
5.
Regulation of body temperature
-Blood helps to maintain the body temperature
by distributing the heat produced by the
chemical activity of the cells
evenly, throughout the body.
Defense actions
-Bloods aids in the defense of the body against
the invasion of microorganism and their
toxins.
Regulates blood pressure
3.
4.
5.
6.
7. Similarities
-Contain 2 parts of heart atrium and ventricle
-Closed circulatory system
DIFFERENCE
FISH
REPTILES
HUMAN
Chambered
2
3
4
Circulation
Single-circuit
circulation
Double-circuit
circulation
Double-circuit
circulation
Septum
No
Incomplete
Complete
Mixing of blood
Yes
Yes
No
No. of valves
2
2
4
Flow of blood
Deoxygenated
blood~auricle~
ventricle~gills~ body
parts
Deoxygenated
blood~right
atrium~ventricle~
lung~left atrium~
Ventricle~body
Deoxygenated
blood~right
atrium~right ventricle~
pulmonary
artery~lungs~left
atrium~left
ventricle~aorta~
body
