LO1: Know the biological systems of livestock Flashcards
what is the function of the pericardium?
protects inner layers of heart
assists with production of pericardial fluid
what are the three layers of the heart?
pericardium
myocardiun
endocardium
what is the function of capillaries?
smallest blood vessels
only one cell thick
facilitate exchange of oxygen, carbon dioxide, nutrients, and waste products between blood and surrounding tissues
what is the function of veins?
thin wall, large lumen
valve prevents backflow
carries deoxygenated blood away from heart
what is the function of arteries?
thick, muscular, elastic walls
carry deoxygenated blood away from heart to other tissues & organs
what is the function of plasma?
transports hormones and water to other organs
what is the function of platelets?
help body repair by stopping bleeding after injury
what is the function of white blood cells?
defend body against disease
what is the function of red blood cells?
deliver oxygen from lungs to body & carry carbon dioxide back to heart
what are the four components of blood?
red blood cells
white blood cells
plasma
platelets
what is the function of the myocardium?
made from cardiac muscle fibres which enable heart contractions
what is the function of the endocardium?
lines heart chamber
covers heart valves
lines large blood vessels
what are the three aspects of circulation?
systemic
pulmonary
portal
what is systemic circulation?
main circulation between heart and cells throughout body
what is pulmonary circulation?
circulation of blood between heart & lungs
what is portal circulation?
detour of deoxygenated blood from digestive system through liver back to heart
what is the role of turbinate bones in the nasal cavity?
layer of blood cells covered by mucous membrane aids sense of smell
what are the two main functions of the nasal cavity
aids sense of smell
modifies incoming air
what is the role of the pharynx?
the shared passageway of respiratory & digestive system
modifies air further through blood vessels & mucous membranes
what are the three main functions of the larynx?
protection - stops foreign material getting to delicate tissue
airway control - adjust size of glottis, closing causes coughing which expels foreign material
warming & humidifying - warms & moistens air
