Sistem_Peredaran_(Jantung).pps

DARAH
&
LIMFE
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BELUM MEMILIKI JANTUNG  VERTEBRATA
MEMILIKI BAGIAN/DAERAH SISTEM
PEREDARAN YANG BERSIFAT KONTRAKTIL &
BERFUNGSI UNTUK MEMOMPA DARAH
ORGAN KONTRAKTIL TERSEBUT TERLETAK
DIANTARA : DUKTUS CUVIERI, AORTA
VENTRAL & VENA HEPATIKA
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KELEP SEMILUNAR
KELEP
ATRIOVENTRIKULAR
KELEP SINOATRIAL
VENA BESAR
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AORTA
VENTRAL
AORTA
LATERAL
DORSAL
KAPILER
INSANG
VENTRICLE
ATRIUM
AORTA
DORSAL
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Carotid
Externa
Carotid
Interna
ATRIUM
Ventrikel
ATRIUM
VENTRICLE
Vena
Pulmonalis
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RIGHT
ATRIUM
LEFT
ATRIUM
LEFT
ARCH
RIGHT
ARCH
Foramen
Panizzae
VENTRICLES
AORTA
Ventrikel
Vena
Pulmonalis
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Role of the Foramen of Panizza in the crocodilian circulatory system:
When a crocodilian is above water and breathing air, the semilunar valve in the right
aorta remains closed because of higher pressure in the left & right aorta (higher than
in the right ventricle). As a result, the right aorta receives blood from the left aorta (so
both aortas carry oxygenated blood) and blood from the right ventricle (low in oxygen)
passes only into the pulmonary artery (and goes to the lungs).
When a crocodilian is under water and not breathing, right ventricular pressure
increases due to pulmonary resistance (vasoconstriction of blood vessels supplying
the lungs). As a result, the semilunar valve in the right aorta is now forced open so
some of the blood from the right ventricle now enters the right aorta rather than the
pulmonary artery. This means that, rather than going to the lungs (where there is little
or no oxygen anyway because the crocodilian is under water & not breathing), some of
the blood enters the systemic (body) circulation. This means that vital organs & tissues
(such as skeletal muscles and the central nervous system) will get an increased blood
supply and additional oxygen. This, in turn, allows a crocodilian to stay underwater
longer (which is most important because many crocodilians hunt by remaining
underwater and 'ambushing' prey that come for a drink or to cool off).
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LENGKUNG
AORTA
KANAN
R.V
R.A
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Ventrikel
Vena
Pulmonalis
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LENGKUNG
AORTA KIRI
ATRIUM
VENTRICLE
ATRIUM
VENTRICLE
Ventrikel
Vena
Pulmonalis
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JANTUNG
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SECARA HISTOLOGIS, JANTUNG TERDIRI DARI :
1. TUNIKA INTERNA (ENDOKARDIUM)
TERSUSUN ATAS SEL ENDOTELIUM PIPIH & LAPISAN
SUBENDOTELIUM YANG TEBAL (JARINGAN IKAT, OTOT
POLOS & SERABUT ELASTIS)
LAPISAN SUBENDOKARDIAL (JARINGAN IKAT YANG
MENGANDUNG VENA, SARAF & CABANG-CABANG SISTEM
PENGHANTAR IMPULS)
2. TUNIKA MEDIA (MIOKARDIUM)
TERDIRI ATAS SEL-SEL OTOT JANTUNG : 1. KONTRAKTIL, 2.
YANG MENIMBULKAN & MENGHANTARKAN IMPULS
3. TUNIKA EKSTERNA (EPIKARDIUM)
LAPISAN VISERAL PERIKARDIUM YANG MEMBUNGKUS
JANTUNG, TERDIRI DARI JARINGAN IKAT (SERABUT
KOLAGEN, ELASTIN & SEL-SEL LEMAK) & SEL EPITEL PIPIH
(MESOTEL)
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JANTUNG MAMALIA TERDIRI ATAS 4 RUANGAN, YAITU :
ATRIUM KIRI, ATRIUM KANAN, VENTRIKEL KIRI &
VENTRIKEL KANAN
DARAH DARI SELURUH TUBUH  ATRIUM KANAN 
LUBANG ATRIO-VENTRIKULAR KANAN (VALVULAE
TRIKUSPIDALIS  VENTRIKEL KANAN  ARTERI
PULMONALIS  PULMO DGN VALVULAE SEMILUNARIS
DARAH DARI PARU-PARU  VENA PULMONALIS 
ATRIUM KIRI  LUBANG ATRIO-VENTRIKULAR KIRI
(VALVULAE BIKUSPIDALIS =VALVULA MITRALIS) 
VENTRIKEL KIRI  TRUNKUS AORTIKUS DGN
VALVULAE SEMILUNARIS
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AORTA
ARTERI PULMONER
ARTERI PULMONER
VENA CAVA ANTERIOR
ATRIUM KIRI
ATRIUM KANAN
VENA PULMONER
VENA PULMONER
KATUP SEMILUNAR
KATUP SEMILUNAR
KATUP ATRIOVENTRIKEL
KATUP ATRIOVENTRIKEL
(BICUSPIDALIS)
(TRICUSPIDALIS)
VENA CAVA POSTERIOR
VENTRIKEL KANAN
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