Answer true or false to the following statements:
a) blood in the pulmonary arteries of a lizard would be partly oxygenated whereas blood from the pulmonary arteries of mammals is deoxygenated.
b) the pulmonary vein carries oxygenated blood in mammals but only partly oxygenated blood in lizards.
c) blood in the aorta of a lizard has a higher oxygen concentration than blood in the pulmonary vein.
d) the difference between the oxygen concentration in arterial blood and venous blood would be greater in mammals than in lizards.
I really need help in this, so any ideas? :-)
2006-09-27 01:49:18 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Biology
a) True, coz heart of lizard or reptiles is three chambered, so there occur mixing of blood; while heart of mamals is four chambered and completely partioned. Also the pulmonary arteries in mammals take deoxygenated blood from right ventricle to lungs for oxygenation.
b)True
c)False, oxygen concentration in both will be nearly equal.
d)True
2006-09-27 02:52:56 · answer #1 · answered by geet 2 · 0⤊ 1⤋
A. True. The pulmonary arteries carry blood to the lungs where it can be oxygenated. Lizards I THINK have a three chambered heart which allows mixing of oxygenated and deoxygenated blood.
B. True. The Pulmonary vein carries oxygenated blood from the lungs back to the heart.
C. Not sure
D. True.
2006-09-27 08:53:25 · answer #2 · answered by danl747 5 · 0⤊ 0⤋
a. False.
Arteries carry oxygenated blood in both lizards and mammals
b.False.
Same answer as above
c. True
The aorta pumps oxgenated blood. Veins carry deoxygenated blood
d.False.
It is the same concentration
2006-09-27 08:54:26 · answer #3 · answered by Anonymous · 0⤊ 0⤋
whats all this about lizards, or are u a lizards, i recently heard that a lot strange creatures come in here and answer questions, are u one of them? yahoo does very little to ascertain the form of organisms that log in here
2006-09-27 09:21:38 · answer #4 · answered by rickybellanco 2 · 0⤊ 0⤋
Knowing the path of the coronary circulation would help :)
2006-09-27 08:53:56 · answer #5 · answered by chemistry_freako 3 · 1⤊ 0⤋
a) True
b) True
c) False
d) True
2006-09-28 21:22:23 · answer #6 · answered by moosa 5 · 0⤊ 0⤋
do your own homework loser.
2006-09-27 09:02:50 · answer #7 · answered by BBQ MASTER 3 · 0⤊ 0⤋
Whatever. Thanks for the points.
2006-09-27 08:54:25 · answer #8 · answered by Anonymous · 0⤊ 0⤋