primary function: veins The musele layer is much Veins in extremities contair Li
ID: 3475480 • Letter: P
Question
primary function: veins The musele layer is much Veins in extremities contair List the factors which assist in return blood than arteries. returning blood to the heart CAPILLARIES function:-- _ between blood and cells What are the two types of capillaries and what does each do? Capillaries are made up of a single layer of endothelial cells. How does that affecet their function? What would happen if blood pressures were high in the capillaries? CIRCULATION Blood flow from the heart to all parts of the body and then back again. - Blood flow from the heart to lungs and back -Blood flows from spleen, stomach, pancreas, gall bladder, and intestines into the liver by way of the portal vein Define the term blood pressure, name the type of blood vessels where blood pressure is significant, and name the normal (average) value in a resting adult. What is a pulse? Systolic pressure= Diastolic pressureExplanation / Answer
Vein:
Q. Veins return blood to heart
Q. The muscle layer is much thinner than arteries
Q. Veins in extremities contain valves
Q. List the factors which assist returning blood to heart :
Capillaries:
Q. Primary function: Facilitate exchange between blood and cells
Q. What are two types of capillaries and what does each do?
a) True Capillaries: Help in echange of substances from capillary blood and tissue
b) Metarterioles: Vessels which connect arterioles and venules
Q. Capillaries are made up of single layer of endothelial cells. How does that affect their function?
A. Since capillary endothelium is single layered, there is minimal resaistance for the transport of molecules across it, thereby facilatitating echange of substances to and fro through it.
Q. What would happen if blood pressures were high in the capillaries?
A. If blood pressures were high in capillaries then their wall cannot withstand the tension caused by blood flowing under high pressure and would lead to their breakage/rupture.
Circulation:
Systemic circulation - Blood flow from heart to all the body parts and then back again.
Pulmonary circulation - Blood flow from heart to lungs and back.
Portal circulation - Blood flows from spleen, stomach, pancreas, gall bladder, and intestines into the liver by the way of portal vein
Blood Pressure
Q. Define the term blood pressure, name the type of blood vessels where blood pressure is significant, and name the normal (average) value in a resting adult.
A. Blood Pressure: Pressure exerted by blood on the walls of blood vessels is known as blood pressure.
The blood vessels where blood pressure is considered significant is arteries as the veins have collapsed lumen and blood pressure measurements are highly vague.
The normal blood pressure in a resting adult is 120/80 mmHg.
Q. What is pulse?
A. Pulse is a feeling of palpation and is felt when an artery backed a bone is compressed (generallu using one's fingers). It is felt at several points in human body like neck (carotid artery), wrist (radial artery), knee (popliteal atery), etc.
Systolic pressure = 120 mmHg
Diastolic pressure = 80 mmHg
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