Lecture 22 - Lactation And Milk Flashcards
1
Q
What is lactation?
A
Secretion of milk from mammary gland
- source of nutrients for newborn offspring
2
Q
What are the 3 main groups of mammals?
A
Monotremes
Marsupials
Placentals
3
Q
What are Monotremes?
A
Egg laying mammals
- primitive glands with absent teats
Ex platypus
4
Q
What are marsupials?
A
Young are carried on a pouch
- short gestation
- extensive lactation period
Kangaroo
5
Q
What are placental mammals?
A
Have a complex placenta
Greater investment on gestation: fetus develops in-utero
6
Q
What is the difference between altricial and precocial young?
A
Altricial - immature at birth, rely on greater maternal care
Precocial - relatively mature at birth, sight and hearing fully developed
7
Q
Mammary gland location and amount
A
Located on pelvic, abdominal or pectoral region
Number of glands vary with species
