Lecture 3 Flashcards
What are the three main components of the heart?
Blood, heart, blood vessels
What is bulk flow?
Occurs when external force is applied to a fluid setting it in motion
What are the 4 types of fluids
Interstitial, blood, lymph, hemolymph
What are functions of hemocytes (blood cells)
oxygen transport or storage, nutrient transport or storage, phagocytosis, immune defense, blood clotting
What does vertebrate blood seperate into?
Plasma, erythrocytes, white blood cells
how does centrifuge seperate blood?
Heaviest component sinks to bottom, light on top
What are characteristics of erythrocytes?
Most abundant cells in blood of vertebrates, high concentrations of respiratory pigments like hemoglobin, round/oval, biconcave, lack nucleus, mitochondria and ribosome in mammals
Increased erythrocytes = ____________
increased viscosity
What are the two types of circulatory systems?
closed and open
What do arteries do
carry blood away from heart
what do veins do
carry blood to heart
What are the 3 parts of a blood vessel
tunica intima, tunica media, tunica externa
How do your blood vessels cool you down
Blood vessels close to skin dilate, ones farther away constrict
What is perfusion
forced blood flow through vessels
What is blood pressure
amount of presure inside blood vasculature that exceeds ambient pressure
What is systolic pressure
highest pressure when ventricles contract
what is diastolic pressure?
lowest pressure during cardiac relaxation
What is the difference of blood pressure below or above heart?
Below is higher BP, above is lower
Poiseulles equation says what about radius?
Radius is inversely proportional to resistance
Hydrostatic resure pushes…
fluid (plasma) from blood to interstitial fluid
Osmotic presure pushes what to where?
Pushes water from interstitial space to capillaries
What does lymph do
picks up interstitial fluid and drains it to prevent buildup
What are the three ways blood flow is regulated?
Auto regulation, intrinsic factors and extrinsic factors
