lecture exam 2 (cardiovascular and respiratory) Flashcards
pulmonary circulation
lung circulation
deoxygenated blood from the right side
systemic circulation
body circulation
oxygenated blood from the left side
aorto
aorta
arterio
artery
cardio
heart
veno and phlebo
vein
angio
blood vessel
hemo and sanguino
blood
apex
pointed caudal end
base
rounded cranial end
mediastinum
space between 2 lungs
pericardial sac
fibrous sac containing the heart
auricle
blind pouch off of an atrium
ventricles
separated by interventricular groove; pump blood out of the heart
atria
receive blood, contract and send blood to ventricles
pericardium
fibrous sac containing heart and the linings
epicardium
visceral layer
myocardium
muscle sheets
endocardium
covers papillary muscles and valves
chordae tendineae
prevents valves from opening backwards
4 functions of the heart
- separates atria and ventricles
- anchors heart valves
- point of attachment for myocardium
- electrical insulation between atria and ventricles
autorhythmic
cardiac muscle created its own contractions and relaxations
deoxygenated blood
from right side of heart to lungs
oxygenated blood
from left side of heart to body (walls are thicker; more blood)
deoxygenated blood flow
vena cava
right atrium
tricuspid valve
right ventricle
pulmonary valve
pulmonary arteries
pulmonary capillaries (switches to oxygenated)
oxygenated blood flow
pulmonary veins
left atrium
mitral valve
left ventricle
aortic valve
aorta
systemic circulation (systemic arteries, capillaries (switches), then veins)
arteries
carry blood away from the heart
2 types of arteries
elastic: near heart (aorta)
muscular: autonomic nervous system (arterioles)
major arteries
aorta (oxygenated)
pulmonary artery (deoxygenated)
capillaries
microscopic blood vessels from branching arterioles; walls: gas and nutrient exchange occurs
veins
carry blood toward the heart; venules: fluid exchange; gravity: valves prevent back flow (one way)
major veins
vena cava (deoxygenated)
pulmonary veins (oxygenated)
blood flow
heart - arteries - arterioles - capillaries - venules - veins - heart
pulse
stretch and recoil of artery with every ventricular contraction
superficial arteries
small: femoral
large: coccygeal
horse: mandibular, digital
cow: facial
cephalic vein location
elbow to carpus
iliac artery and vein location
where aorta and caudal vena cava bifurcate
femoral artery and vein location
name changes at abdominal wall
lateral saphenous vein location
lateral hindlimb between hock and stifle
respiratory system main function
bring in oxygen from outside and get rid of carbon dioxide
respiratory system secondary functions (4)
- voice production
- body temp regulation
- acid-base balance
- sense of smell
upper respiratory system
not lungs
- nostrils
- nasal cavity
- pharynx
- larynx
- trachea
lower respiratory system
lungs and bronchi
- bronchi
- lungs
- bronchioles
- alveolar ducts
- alveoli
hilius
where air, blood, lymph, and nerves enter
other structures included in respiratory system
mediastinum
diaphragm
pleura
intercostal muscles
pleura
covers structures and inner walls of thoracic cavity
intercostal muscles
muscles between ribs
external respiration
lungs; exchange between air and blood
internal respiration
body; exchange between blood and cells/tissues
breathing =
inspiration and expiration
how does breathing occur (4)
- partial vacuum within thorax
- pulls lungs tightly out against thoracic wall
- allows lungs to follow movements of thoracic wall and diaphragm
- air passively enters and exits with changes of thoracic volume
inspiration
- increases thoracic cavity size
- diaphragm contracts becoming flat
- external intercostal muscles rotate ribs up and out
expiration
- decreases thoracic cavity size
- abdominal muscles push organs against diaphragm to get dome back
- internal intercostal muscles rotate ribs backwards
pharynx
- where respiratory and digestive cross
- divided by soft palate
- pathway for air
larynx
- control of airflow to and from lungs (changes size of glottis)
- prevention of inhalation of foreign objects (epiglottis covers opening)
trachea
- air pathway
- filters debris out and moves to larynx
bronchial tree
airway pathway
- continues filtering
- autonomic nervous system changes diameter to aid breathing needs
alveoli
- thin-walled sacs surrounded by capillaries
- for external respiration
nasal passage
- condition inhaled air
- warming, humidifying, filtering
endothelium
inner layer of blood vessels
pericardium
lines chambers of heart
afferent never fibers
carry sensations toward CNS