sistem peredaran
DESCRIPTION
SISTEM PEREDARAN. DARAH. &. LIMFE. JANTUNG. AMPHIOXUS. 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. - PowerPoint PPT PresentationTRANSCRIPT
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26 Maret 2010 Struktur Hewan/Any Aryani/Bio 1
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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VENA BESAR
KELEP SINOATRIAL
KELEP ATRIOVENTRIKULAR
KELEP SEMILUNAR
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AORTA VENTRAL
AORTA DORSAL
AORTA LATERAL DORSAL
KAPILER INSANG
VENTRICLE
ATRIUM
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Vena Pulmonalis
Ventrikel
Carotid Interna
Carotid Externa
ATRIUM ATRIUM
VENTRICLE
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Ventrikel
Vena Pulmonalis
Foramen Panizzae
AORTA
LEFT ATRIUMRIGHT
ATRIUM
VENTRICLES
RIGHT ARCH
LEFT ARCH
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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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R.A
R.VVentrikel
Vena Pulmonalis
LENGKUNG AORTA KANAN
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Vena Pulmonalis
Ventrikel
ATRIUM
VENTRICLE
ATRIUM
VENTRICLE
LENGKUNG AORTA
KIRI
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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
ATRIUM KIRI
KATUP SEMILUNAR
VENA PULMONER
KATUP ATRIOVENTRIKEL
(BICUSPIDALIS)
VENTRIKEL KIRIVENTRIKEL KANAN
VENA CAVA POSTERIOR
KATUP ATRIOVENTRIKEL
(TRICUSPIDALIS)
KATUP SEMILUNAR
VENA PULMONER
ATRIUM KANAN
VENA CAVA ANTERIOR
ARTERI PULMONER
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