Intro To CVS Flashcards
...
CVS consists of?
Heart
Blood vessels
Anastomisis
Union between multiple branches of arteries to ensure alternative supply in the event of the closure of a blood vessel
Which arteries do not have precapillary anastomosis
True terminal or end arteries
Eg in the retina
And functional terminal arteries
In the brain, kidneys, spleen, liver and intestines heart
Look at types of anastomosis in your notebook
..
Which veins have valved
Limb and neck veins
What is portal venous circulation?
Venous system between two capillary beds
Peripheral limb veins form venae comitantes of their arteries, why?
Artery pressure generated acts as a pump so veins are inelastically connected to it by fascia
Pseudounipolar sensory neurones?
Have a single process from cell body which divides into peripheral and central processes
Cell body outside CNS in sensory ganglia
What are neuroglis?
Non neuronal cells that are not electrically active in the same way as neurons. Responsible for creating and maintaining appropriate environment function of neurones
What are the neuroglia in the cns
Macroglia (oligodendrocytes, astrocytes and ependymal cells)
Microglia (special tissue macrophages)
Neuroglia in PNS
Schwann cells
Satellite cells
What is the function of the CNS
Integration and coordination of incoming and outgoing signals
(Brain and spinal cord contains majority of the neuronal cell bodies)
Nerve fibre consists if
Axon, neurolemma and endoneurium
Endoneurium?
Connective tissue that surrounds an axon
Functional classification if nerves
Afferent(sensory) fibres
Efferent (motor) fibres
