This tunica media of the
arteriole (smaller arteries) are made up of areolar tissues and smooth muscles,
these responds to nervy stimulation and distend to allow blood flow to various
organs. The contrition of the blood vessels (arterioles) causes the rise in
blood pressure while the Dilation can cause fall in Blood pressure. Their
elasticity varies with age. E.g at old age, they become less elastic and
increases the total peripheral resistance which leads to some degrees increase
in blood pressure.
arteriole (smaller arteries) are made up of areolar tissues and smooth muscles,
these responds to nervy stimulation and distend to allow blood flow to various
organs. The contrition of the blood vessels (arterioles) causes the rise in
blood pressure while the Dilation can cause fall in Blood pressure. Their
elasticity varies with age. E.g at old age, they become less elastic and
increases the total peripheral resistance which leads to some degrees increase
in blood pressure.
Also peripheral resistance
depends not only on the size of the blood vessels but also on the viscosity of
the blood. Viscosity is therefore directly proportional to the peripheral
resistance. The following equation is the relationship between pressure,
peripheral resistance and cardiac output
depends not only on the size of the blood vessels but also on the viscosity of
the blood. Viscosity is therefore directly proportional to the peripheral
resistance. The following equation is the relationship between pressure,
peripheral resistance and cardiac output
Co = (cardiac output) ∆P(change in arterial pressure)
PR (peripheral resistance)