LECTURE 3 breast, mammary glands, surface anatomy

Question 1

location of the female breast

Answer 1

deep to skin, superficial to thoracic cavity; superior border: 2nd rib, inferior border: 6th rib, medial border: sternum, lateral border: midaxillary line

Question 2

location of male nipple

Answer 2

fourth intercostal space, midclavicular line

Question 3

underlying muscle of breast

Answer 3

pectoralis major and minor, part of serratus anterior, external obliques

Question 4

arteries of breast

Answer 4

lateral thoracic artery, branches of internal thoracic artery, posterior intercostals

Question 5

veins of breast

Answer 5

intercostal, internal thoracic, axiallary

Question 6

innervation of breast

Answer 6

branches of intercostal nerve

Question 7

lobes of breast (mammary glands)

Answer 7

15-25 lobes (each a compound alveolar gland), lobes separated by adipose tissue and suspended by connective tissue (suspensory ligaments of the breast)

Question 8

lactiferous glands (mammary glands)

Answer 8

acini/alveoli linked with milk-secreting simple cuboidal epithelium, directed towards lactiferous sinuses, latiferous ducts of lobes open at nipples

Question 9

areola-ring of pigmented skin around nipple

Answer 9

sebaceous gland produce sebum during nursing, smooth muscle present to make nipple erect

Question 10

anterior surface of thorax

Answer 10

palpate: sternum (3 parts), jugular notch, sternal angle (2nd rib), clavicle, costal margin, xiphosternal joint; midclavicular line; midaxillary line

Question 11

posterior surface of thorax

Answer 11

palpate: spinous process of c7, scapula (ribs 2-7): scapular spine, acromion process, inferior angle of spine, inferior border