avian systems Flashcards
repro diff in birds to mammals?
only 1 ovary/oviduct on the left side, has a cloaecha as well
when is oviduct functional?
17-19 WOA, can produce eggs for sale at 20 WOA
infundibulum
searches out and engulfs yolk, aka funnel of oviduct. yolk stays in it 15-18 minutes. site of fertilization
albumen function
prevent microbe growth and invasion
binds iron to limit bacteria
source of water, fat protiens for embryo
isthmus
formation of inner and outer shell membranes. forms air bubble for when chick is ready to hatch
shell membrane purpose
permits passage of gasses/water
prevents albumin from leaving the egg
shell gland
aka uterus. calcification occurs in formation of egg shell
calcium for shell comes from diet and medullary bone stores
calcification process eggs
initial depot on outer shell when Ca appears as egg
chicken vagina
no role in egg formation, cuticle deposited onto shell to make laying easier
role is to expel the egg
stores sperm
eggshell pores
small pores in egg to allow air exchange
pauses in clutch good or bad
bad- no eggs during pause, shorter ovulation cycle after a long pause
egg peak production
6-10 weeks
do birds have sweat glands?
no
semen storage in birds
vas deferens
parabronchi
small tubes that are going to further subdivide into air capillaries which will be surrounded by blood capillaries where gas exchange can take place between the two “sets” of capillaries
