Flashcards in Cardiovascular system Deck (113)
List characteristics of an Elastic Artery
Contain high proportion of elastic fibres in tunica media
Found near the heart
What is another name for Elastic Arteries
List characteristics of Muscular Arteries
Contain more smooth muscles
Contain fewer elastic fibres
What are Muscular arteries otherwise known as?
List examples of Muscular arteries
What is the function of arterioles?
Regulate blood flow to capillaries by altering diameter of capillaries.
What tissue are capillaries composed of?
What is a function of capillaries?
Linking arterioles to venules
Allow water, nutrients, gases and waste products in and out of blood supply
Which two sites of the body do not contain capillaries?
Cornea of the eye
Epidermis of the skin
What type of specialist cell are found in venules?
Which has a larger lumen, vein or artery?
What do veins have that arteries do not?
What is Blood Pressure?
The force exerted by the circulating blood on the walls of the blood vessels. It refers to Arterial blood pressure
What are the 3 main factors that regulate blood pressure?
Autoregulation of blood pressure
Where are the baroreceptors located?
Carotid sinus & Aortic arch
Where are the chemoreceptors located?
Aortic and carotid bodies
What is the function of the aortic and carotid bodies?
They detect changes in oxygen, carbon dioxide and hydrogen ion concentrations
List 5 hormones involved in BP regulation
List 5 factors that affect BP
(Not age, gender, stress, hormones, drugs
What is the Aorta?
First major blood vessel of the arterial circulation. Emerges from the left ventricle of the heart
What is a baroreceptor?
A neuron sensing changes in fluid, air and blood pressure
What is a chemoreceptor?
A sensory receptor that detects the presence of a specific chemical