Digestive Tract Anatomy & Repro
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Digestion
Food turned to substances and absorbed by the body
What’s absorption
Movement of substances from GI tract to cells/blood
Ruminants
Herbivores that have a complex stomach that uses microbes to digest. They have a long digestive tract that utilizes fiber. Volatile fatty acids come from rumen, pH 4-7 digestion takes 1-4 days.
Monogastric
Omnivore or carnivore, simple stomach, enzymatic digestion, no protein synthesis, short digestion tract, no big use of fiber, pH 2-4, digestion 8-12hr, glucose = immediate energy
RROA (Rory Ran Over Apples)
Rumen, Reticulum, Omasum, Abomasum
Rumen
Large and filled with wet feed, fermentation by microbes
Reticulum
Traps large feed particles to send back up for chewing, honey comb pattern
Omasum
Water regulation
Abomasum
True stomach with acid
Progesterone is…
The hormone of pregnancy, makes them more chill.
Estrogen is…
Makes the cow more jacked up and receptive to mating
Where is the Follicle
Within the ovary and shows up as spots
Corpus Luteum
Yellow part that protrudes from the ovary
What’s in a bull’s testicle?
Semen, testosterone
Vans Deferens
Tube that transports semen from testicles to penis
Why do we care about reproduction?
Milk, calves, welfare, adaption
If a cow doesn’t get pregnant on time…
Milk is lost, continuing to milk will only run out over time
Estrus
Period of sexual reception in female A.K.A heat
Estrous Cycle
The whole reproductive cycle from one to the next in females
Length of estrus cycle
21 + or - 2 days
Before ovulation, the follicle is…?
The follicle in the ovary is undeveloped
After ovulation
The corpus luteum is developed
The estrus length in hours for cows
Between 8-16 hours
Secondary signs of heat
Swollen vulva, mucus discharge, alert and active, head resting