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Circulatory system in animals
1.
Circulatory systemin animals
2.
Lesson objectivesTo identify organs involved in transport of
substances in animals.
3.
Circulatory system is transportsystem of animals.
It brings nutrients and oxygen to
cells and remove wastes
4.
Parts of circulatory system are:Heart
Blood vessels
Blood
5.
There are 2 types of circulatorysystem:
Open
Closed
6.
7.
In closed circulatory system bloodnever leaves blood vessels.
In open circulatory system blood
vessels transport fluids into body
cavity.
8.
Circulation in annelidsAnnelids have closed circulatory system.
They have:
5 aortic arches, that pumps the blood
(function like a heart)
Two main blood vessels: dorsal and
ventral
9.
10.
Circulation in mollusksMost of Mollusks have an open
circulatory system.
They have: heart, blood and blood
vessels.
11.
But some mollusks, such asoctopuses and squids have closed
c.s. They have: heart, blood vessels
. blood
and
12.
Circulatory in arthropodsArthropods are organisms with segmented
body.They have exoskeleton.
Examples are insects, arachnids, crustaceans.
13.
They have open c.s.They have:dorsal heart and vessels.
14.
Circulatory organs in vertebratesAll vertebrates have closed
circulatory system.
15.
Fishes have two-chambered heart,with one ventricle and one atria
16.
Amphibians have threechambered heart with oneventricle and two atria
17.
Reptiles (except crocodiles)have three-chambered heart
with two atria and partially
divided ventricle.
18.
Crocodiles, birds and mammals havefour-chambered heart with two
atria and two ventricle.
19.
Let’s do the activity on p. 5320.
HomeworkRead p.52-53
Literacy on p. 53
New words