NIRISS Science Team Meeting Oct 2015 NIRISS Activities in CV3 André Martel.
cv3
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The cardiovascular syste m Right vert ebra l Trache a Lett common Superfic ial tempor _: Occipi ~F----+----- --- brachioceph alic vein 1------ +---- Extern al caroti Brachiocepha li Facial artery Inter nal carot Superio r thyro Common carotid artery \ Figure 5.30 The arch of the aorta and its branches. Figure 5.31 Main arteries of the left side of the head and neck. The superior thyroid artery supplies the thyroid and adjacent muscles. The lingual artery supplies the tongue, the lining membrane of the mouth, the structures in the floor of the mouth, the tonsil and the epiglottis. • gla nd Willis (Fig. 5.34). Four large arteries contribute to its for- mation: two internal carotid arteries and two vertebral arter- ies (Fig. 5.35). The vertebral arteries arise from the subclavian arteries, pass upwards through the foramina in the transverse processes of the cervical vertebrae, enter the skull through the foramen magnum, then join to form the basilar artery. The arrangement in the circulus arterio- sus (circle of Willis) is such that the brain as a whole receives an adequate blood supply when a contributing artery is damaged and during extreme movements of the head and neck. Anteriorly, two anterior cerebral arteries • 9 7 • mouth. The pulse may be felt where the jaw bone. the artery cross es The occipital artery supplies • the posterio part of the The temporal artery passes • upwards over th e zygomatic process in front of the ear and supplies the frontal, temporal and parietal parts of the scalp. The pulse may be felt in front of the upper part of the ear. The maxillary artery supplies the muscles of mastication and a branch of this artery, the middle • • • • • • • 2 anteri or 2 cerebral arteries carotid a major contributor to the circulus arteriosus (circle of Willis) (Fig. 5.34) which supplies the greater part of the brain. It also has branches that supply the 2 posterior communicating arteries 2 posterior cerebral arteries 1 basilar artery. From this circle, the anterior cerebral Circulus arteriosus (circle of Willis). The greater part of the brain is supplied with arterial ward to supply the anterior part of the brain, the middle cerebral arteries
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Transcript of cv3
The cardiovascular system
Right vertebral artery
Right common carotid artery
Trachea
I
Lett common carotid artery Superficial
temporalartery
_::r
Occipital~F----+-----artery
---Lettbrachiocephalic vein
1------+---- External carotid arteryBrachiocephali
arteryFacial artery
Li n9 ual artery
Internal carotid artery
Superior thyroid artery
Common carotid artery
\
Figure 5.30 The arch of the aorta and its branches.
Figure 5.31 Main arteries of the left side of the head and neck.
The superior thyroid artery supplies the thyroidand adjacent muscles.The lingual artery supplies the tongue, the lining membrane of the mouth, the structures in the floor of the mouth, the tonsil and the epiglottis.The facial artery passes outwards over the mandiblejust in front of the angle of the jaw and supplies the muscles of facial expression and structures in the
• gland Willis (Fig. 5.34). Four large arteries contribute to its for-mation: two internal carotid arteries and two vertebral arter- ies (Fig. 5.35). The vertebral arteries arise from the subclavian arteries, pass upwards through the foramina in the transverse processes of the cervical vertebrae, enter the skull through the foramen magnum, then join to form the basilar artery. The arrangement in the circulus arterio- sus (circle of Willis) is such that the brain as a whole receives an adequate blood supply when a contributing artery is damaged and during extreme movements of the head and neck.
Anteriorly, two anterior cerebral arteries arise from theinternal carotid arteries and are joined by the anterior communicating artery.
Posteriorly, two vertebral arteries join to form the basilar artery. After travelling for a short distance the basilar artery divides to form two posterior cerebral arteries, each of which is joined to the corresponding internal carotid artery by a posterior communicating artery, completing the circle. The circulus arteriosus is therefore
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mouth. The pulse may be felt wherethe jaw bone.
the artery crosses
The occipital artery suppliesscalp.
• the posterior part of the
The temporal artery passes• upwards over thezygomatic process in front of the ear and supplies thefrontal, temporal and parietal parts of the scalp. The pulse may be felt in front of the upper part of the ear. The maxillary artery supplies the muscles of mastication and a branch of this artery, the middle meningeal artery, runs deeply to supply structures in the interior of the skull.Internal carotid artery. The internal carotid artery is
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2 anterior2 internal1 anterior
cerebral arteriescarotid arteries communicating artery
a major contributor to the circulus arteriosus (circle ofWillis) (Fig. 5.34) which supplies the greater part of the brain. It also has branches that supply the eyes, forehead and nose. It ascends to the base of the skull and passes through the carotid foramen in the temporal bone.
2 posterior communicating arteries2 posterior cerebral arteries1 basilar artery.
From this circle, the anterior cerebral arteries pass for-Circulus arteriosus (circle of Willis). The greater part ofthe brain is supplied with arterial blood by an arrange- ment of arteries called the circulus arteriosus or the circle of
ward to supply the anterior part of the brain, the middlecerebral arteries pass laterally to supply the sides of the
