Blood Vessels and Nerves Flashcards
General structure of blood vessels (7)
Loose Shit involved in making everyone annoyed
1) Lumen
2) Squamous endothelium on BM
3) Intima
4) Internal Elastic Lamina
5) Media
6) External Elastic Lamina
7) Adventitia
Two types of Arteries?
1) Elastic (Near heart and elastin)
2) Muscular (smooth muscle and most abundant)
How many layers do arterioles have in media, and what do they give rise to?
1) 3 or less
2) Capillary Networks
Structure of Capillaries?
Bonus for regulator
Lumen surrounded by Endothelium and Basement membrane
Pericyte: Layer of discontinuous cells
Two features of veins?
1) No External Elastic Lamina
2) Thin walled, larger lumen and thinner media
Structure of Venules?
Thin walled with pericytes around outside of endothelial layer (Complete layer as cells increase in size)
Venules –> Veins, what happens to outer layer regulator?
Pericytes are replaced by smooth muscle
Two structural features of lymphatics?
1) Thin walled
2) Contains valves (Made of collagen)
What are found in lymphatics? (2)
1) Eosinophilic Lymph
2) Lymphocytes
Layers of Peripheral Nerves? (3)
Every person eats
1) Endoneurium (Between ind. axons)
2) Perineurium (Groups of axons –> Fascicles)
3) Epineurium (Fasciles bind to form nerve fibres)
Difference in size and speed of two axons?
Myelinated axons are much larger and quicker (Less in number)
How many axons myelinated by a Schwann cell?
One
4 types of Peripheral Nerves?
Make somebody say poo
1) Motor
2) Sensory
3) Sympathetic
4) Parasympathetic
Where is each type found?
1) Motor: Cell bodies in GM of SC
2) Sensory: CB in DRG
3) Symp: CB in GM of SC and Autonomic ganglia
4) Para: Cell bodies in brain and local ganglia
What do arteries contain which veins lack?
External Elastic Lamina
