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Flashcards in Circulation Deck (192)
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1

Name the 3 parts of the circulation

  • Resistance part (Arteries)
  • Exchange area (Capillaires)
  • Reservoir (Veins)

2

Location of resistance part of the circulation

Left ventricle → Capillary bed

3

Location of the exchange area of the circulation

Locations of bidirectional transport of material

4

Location of the reservoir system of the circulation

Venules → Right atrium

 

5

Under normal conditions, the largest part of blood volume is located in...

The reservoir system

6

Describe the structure of an artery

  • Muscular
  • Elastic
  • Thick walled

7

Describe the structure of an arteriole

  • Muscular
  • Little connective tissue

8

Describe the structure of a capillary

  • Endothelial layer
  • No muscle

9

Describe the structure of a venule

  • Thin walls
  • Some smooth muscle

10

Describe the structure of a vein

  • Thin-walled
  • Smooth muscle
  • Flacid

11

The resistance part is composed of...

  • Elastic arteries
  • Muscular arteries
  • Arterioles

12

Elastic arteries

  • Aorta & large arteries
  • Loaction of passive contraction (due to elastic elements)

13

Muscular arteries are the sites of...

  • Regulated resistance
  • Smooth muscle → active contraction

14

Arterioles

  • Most important part of regulated resistance

15

During diastole, the aorta...

Passively contracts

16

'Windkessel' function of the aorta

  • A simple pump with a closed air buffer
  • Storage of pressure in the Windkessel
  • Results in a near-constant pressure

17

What is the location of capillary exchange?

Area of microcirculation

18

List the types of capillary

  • Continuous
  • Fenestrated
  • Porous
  • Sinusoid

19

Location of continuous capillaries

  • Muscle
  • Skin
  • CNS
  • Lung

20

Location of the fenestrated capillaries

  • Intestinal mucosa
  • Endocrine glands

21

Location of the porous capillaries

Glomeruli of the kidney

22

Describe the structure of continuous capillaries

  • Endothelium (Inside layer)
  • Lamin basalis
  • Pericytes (Outside layer)

23

Sinusoid capillaries lack...

Pericytes

24

Disse-space

25

Location of sinusoid capillaries

  • Liver
  • Haemopoietic organs

26

What limits the enlargement of veins?

Collagen

27

List the types of Venule

  • Postcapillary venule
  • Collecting venule
  • Muscular venule

28

The function of venules is determined by...

The structure of the wall and valves

29

Potential energy

The pressure exerted onto the wall of the container (vessels)

30

Kinetic energy =

1/2 m x v2