Angiology

Question 1

Arteries

(2)

Answer 1

• Can be divided into 2 types

1. Elastic arteries
2. Muscular arteries

Question 2

Elastic arteries

Answer 2

• largest arteries including those closest to the heart (i.e. aorta are elastic in type)
• The plentiful elastic tissue in their walls allows for a considerable degree of distension on contraction of the heart followed by elastic recoil helping to propel the blood through the circulatory system
• The large quantity of elastic tissue within the walls of these vessels accounts for the yellowish color

Question 3

Muscular Arteries

Answer 3

• presence of much smooth muscle in these small diameter arteries
• arterioles enables these to constrict in diameter increasing peripheral to flow
• Therefore, contributes to the regulation of blood pressure

Question 4

Veins

Answer 4

• of largest diameter
• convey blood at low pressures and therefore have relatively thin walls
• Unlike arteries, many veins contain valves to assist in the directional flow of blood
• In many parts of the body, an artery and a vein accompany eachother closely and are described as being satellite to eachother (veins can be distinguished by larger diameter)
• The relatively thin walls results in the contained blood , wheter fresh or embalmed, being partially visible through the wall–> gives darker appearance
• The thicker wall of the smaller diameter satellite artery results in a paler, pinker appearance

Question 5

Lymphatic Vessels

Answer 5

• Only the largest lymphatic vessels can be identified at naked eye level
• Of these, the largest is the thoracic duct in the thoracic cavity –> has general appearance of a thin walled vein
• the presence of very numerous valves results in a highly beaded appearance