anatomy prac 2 ayyy Flashcards
dorsal branches of the spinal nerves supply ____ muscles
epaxial
ventral branches of spinal nerves supply ____ muscles
hypaxial
thoracic and lumbar nerves are _____ to their correspondent vertebrae
caudal
CNS 8 is _____ to cervical vertebra 7
caudal
the first pair of cervical spinal nerves emerge from where ?
the lateral vertebral foramen of the atlas
the vertebral artery, vein, and nerve pass through ______ of cervical vertebrae 1-6
transverse foramina
immediately caudal to the wing of the atlas and emerges between the cleidomastoideous and omotransversarius
2nd pair of cervical spinal nerves
Cranial nerve XI is also the what nerve
accessory spinal nerve
cranial nerve XI supplies what muscle
trapezius
the 2 major body cavities that are separated by the diaphragm
thoracic cavity
abdominopelvic
thoracic cavity dorsal boundary
T1-T13
thoracic cavity ventral boundary
8 sternebrae
thoracic cavity lateral boundary
13 pairs of ribs and 2 costal arches
diaphragm is what type of muscle
skeletal – under voluntary control
where to the lumbar right and left crura of the diaphragm attach
bodies of the 3/4th lumbar vertebrae
four diaphragm openings
- lumbocostal arches - not a true opening
- aortic hiatus
- esophageal hiatus
- caval foramen
aspiration of pleural fluid from the abdomen
thoracentesis
can be approached without risk to pleural cavity clinically
diaphragmatic line of pleural reflection
where the vena cava passes the diaphram
plica vena cava
clinical issue with diaphragm
diaphragmatic hernias
prevents frictional irritations in viscera
serous liquid filling serous cavities
3 serous cavities in the thoracic region
pleural (right and left)
pericardial
serous cavity in the abdomen
peritoneal
pleural effusions
liquid accumulation in thoracic cavity
recesses/pockets of the pleural cavity
pleural cupula
4 “recesses”
- costomediastinal
- costodiaphragmatic
- mediastinal
- lumbodiaphragmatic
dorsal boundaries of the cervical visceral space
longus capitus and longus coli
ventral boundaries of the cervical visceral space
sternohyrodius
sternocephalicus
fibrous pericardium
dense connective tissue
parietal pericardium
internal lining
like a parasaggital wall that continues cranially as the cervical visceral space
mediastinum
contents of the cervical visceral space
trachea esophagus thyroid gland parathyroid gland recurrent laryngeal nerves tracheal lymph nodes carotid sheath with common carotid arteries, vagosympathetic trunk and internal jugular veins
endocrine gland located cranially to the sternum and is more developed in the young
thymus gland
functional blood supply of the lungs
pulmonary arteries and veins
nutritional blood supply of the lungs
bronchoesophageal artery
right azygos vein
has incomplete cartilaginous rings connected by annular ligaments
trachea
branches into bronchi
trachea
conducting system of respiratory system
trachea and bronchial tree
exchange portion of respiratory system
respiratory bronchioles – alveolar ducts/sacs and alveoli
has a groove for vena cava to transverse the lungs
accessory lobe of the right lungs
first branch off ascending aorta into aortic arch
brachiocephalic trunk
second branch off of the aortic arch
left subclavian artery
supplies the cranial intercostal spaces and muscles of the neck
costocervical trunk
extends through transverse vertebral foramina to supply the brain
vertebral artery of the left subclavian
branches of the subclavian arteries
- costocervical trunk
- vertebral artery
- superficial cervical artery
- internal thoracic artery
supplies the superficial structures of the neck
superficial cervical artery
supplies ventral intercostal spaces and costal wall and continues as the cranial epigastric artery
internal thoracic artery
3 veins that do not have arterial counterparts
cranial vena cave
caudal vena cava
right azygos
vein that drains from the head
cranial vena cava
veins that drain from the thoracic wall
caudal vena cava and right azygos
relay sensory info TO the CNS
afferent
relay motor output FROM the CNS
efferent
T/F
interneurons are located entirely in the CNS
TRUUU
involuntary tissues
smooth muscle, cardiac muscles, glands
composed of both sensory neuron fibers and motor neuron axons
mixed nerve
T/F
all spinal nerves are mixes nerves
TRUE
what comes from the dorsal root
afferent axons of both somatic and visceral sensory neurons
comes from the ventral root
efferent somatic motor neuron axons
have a cell body located in the CNS, and the axon synapses onto a second autonomic neuron in autonomic ganglion
presynaptic ganglionic neuron
has a ganglion outside of the CNS and axon synapses on target tissue
postsynaptic ganglionic neuron
fight or flight
SNS
rest and digest
PSNS
releases adrenaline
SNS
releases acetylcholine
PSNS
comes from the craniosacral regions and synapse in ganglia located within the organs that they innervate
parasympathetic division
located on either side of the vertebral column and is comprised of comprised of post synaptic cell bodies
paravertebral chain
comes from thorocolumbar regions
sympathetic innervation
ganglion at the head level, not seen in lab
cranial cervical ganglion
three ganglia of the cervical region
cervicothoracic
middle cervical
cranial cervical
3 pre-vertebral ganglion
celiac
cranial mesenteric
caudal mesenteric
nerves that originate from the paravertebral chain and communicate with the pre-verbebral ganglia
splanchnic nerves
originate from the caudal mesenteric ganglion and is made of post-SNS axons that innervate viscera from the pelvic cavity
hypogastric nerves
made of pre-synaptic fibers within the carotid sheath
vagus nerve
issued by the vagus nerve within the middle mediastinum, they ascend the trachea to larynx and supply parasympathetic fibers
recurrent laryngeal nerves (r/l)
what does the right recurrent laryngeal wrap around
right subclavian artery
what does the left recurrent laryngeal wrap around
ligamentum arteriosum and the arch of the aorta
mixed nerves that give somatic motor innervation to the diaphragm
phrenic nerves
a very tough, fibro-serous membrane around the heart that is contained in the middle mediastinum
pericardium
continuation of the fibrous pericardium to the diaphragm
phrenicopericardial ligament
- *sternopericardium in large animals
- -restricts movement of heart
pericardium attached firmly to the heart
visceral (epicardium)
T/F
the parietal and fibrous pericardium can be easily separated
FALSE
azygos vein in fetus and sometimes ruminants
bilateral
side that azygos vein persists in carnivores and horses
right
side the azygos vein persists in ruminants and pigs
left
part of heart that consists of the left ventrical
Apex
Do pulmonary arteries carry oxygenated or deoxy blood
deoxygenated
Do pulmonary veins carry oxy or deoxy blood
oxygenated
blind sac of the heart
auricle
receives blood from systemic veins
right atrium
4 openings of the right atrium
coronary sinus
caudal vena cava
cranial vena cava
atrioventricular orifice
diverts the blood from the cranial and caudal vena cavas into the right ventricle
intervenous tubercle
what strengthens the auricles
pectinate muscles that interlace each other
location of the fossa ovalis
caudal to the intervenou tubercle in the right atrium
separation of the main compartment and the auricle
crista terminalis
receives blood from right atrium
right ventricle
cords extending from the AV valve to the papillary muscles
chordae tendinae
**prevent valve from flipping backward
sends blood to the lungs
right ventricle
myocardial ridges in the right ventricle as papillary muscles
trabeculae carnae
receives blood from the lungs
left atrium
mitral valve
left AV valve
which ventricle is thicker
left – stronger to send blood throughout body
AV valve cusps
- septal – adjacent to septum
2. parietal – adjacent to outer ventricular wall
between Right ventricle and pulmonary vessels
pulmonary semilunar valve (has 3 cusps)
between left ventricle and aorta
aortic semilunar valve
origin of the left and right coronary arteries
aortic sinuses
base of heart points ____
dorsocranially
apex of heart points _____
caudoventrally
angle of heart in pupper
45 degrees
what is PAM
they are the three locations to listen to on the left side of the heart of points of max intensity
P: pulmonic valve
A: aortic valve
M: mitral valve
point of max intensity on right
right AV valve
What are the PAM on dogs
left side **
P: 3rd intercostal space
A: 4th intercostal space
M: 5th intercostal space
where do you listen to the right av valve on a dog
4th intercostal space on right side
PAM on horses
P: 3rd intercostal space
A: 4th intercostal space
M: 5th intercostal space
right av valve listening on horse
between 3-4th intercostal space on right side