Lecture 23 Flashcards
What are mammary glands and where do they form?
- mammary glands are essentially modified sweat glands - form anywhere along the milk line from axilla to the inguinal region depending on the species
Describe the pathway of milk secretions from the mammary glands:
lobular and lobar ducts drain into the lactiferous sinus, then the teat sinus and discharge via the papillary duct (stratified squamous epithelium)
What is the composition of inactive (involuted) glands?
- mostly ductular elements - cuboidal epithelium in alveoli - myo-epithelial cells are relatively more abundant - concretions of casein in ducts = corpora amylacea
What are the main hormones that stimulate the development of mammary glands?
- oestrogen, progesterone and prolactin
What is the name of the hormone that stimulates the letdown of milk?
- oxytoxin
What is the apperance of active mammary glands?
- proliferation of secretory components - epithelium is much more columnar
Is this mammary gland active or inactive?
Inactive
Is this mammary gland active or inactive?
Active
Which side of the ovary and oviduct persists within avian species?
the left
What are the five main segments of the oviduct within birds in order ?
Infundibulum to magnum to isthmus to uterus to vagina
Name each of the following parts of the egg:
- ovary
- infundibulum
- magnum
- isthmus
- soft egg
- cloaca
Name each of the following parts of the egg:
- infundibulum
- magnum
- isthmus
- shell gland
- vagina
What is the function of the infundibulum?
site of fertilisation
What is the function of the magnum?
formation of the albumen
What is the function of the isthmus?
forms the shell membrane
