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Animal Science
Animal Science for Dr. Gentry at LSU
58
Science
Undergraduate 1
09/10/2009

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Term
Animal Science
Definition
The combination of disciplines that together comprise of the study of animals.
Term
Agriculture
Definition
The combination of science and art used to cultivate and grow crops and livestock and process the products.
Term
Appearances of the domestic species
Definition
Sheep, goats, hogs, cattle, horses, donkeys, and chickens.
Term
Fields of animal science
Definition
Genetics, nutrition, physiology, animal health, ethology, meat science, dairy product science, and biotechnology
Term
Animal proteins
Definition
meat, milk, fish, eggs
Term
Important meats
Definition
pork, poultry, beef
Term
nutrition from meats
Definition
lots of good nutrients for the amount of calories
Good source of vitamins, minerals, and protein
fills you up
Term
Adaptation
Definition
Sum of adjustments occurring in an organism that promotes it welfare and favors its survival in a specific environment
Term
Different Stresses
Definition
Climatic, nutritional, internal, geographical, and social
(SINGC)
Term
Adaptive Changes
Definition
Morphological, anatomical, physiological, and behavioral
BAMP
Term
Different Environments
Definition
Tropical Deserts Cold and Temperate (CTDT)
Term
Tropical Stresses
Definition
2 season (dry and wet)
forced to move from area to area
extreme heat
diseases and parasites
Term
Desert Stresses
Definition
Shortage of water
extreme heat
wind stress
Term
cold stress
Definition
cold stress
availability of food
Term
temperate stress
Definition
ZERO =]
Most productive environment
Term
Religious effects
Definition
Muslims don't eat pork
Judaism eat no pork and only kosher
Hindu don't eat cows
Term
developed Agriculture
Definition
Small propotion of the population farm
highly specialized
highly mechanized
high per capita income
high literacy rate
Term
Subsistence Agriculture
Definition
Half of the population farms
eats roughly what they produce and have very little to sell
little mechanization
low per capitia income
low literacy rate
Term
primitive agriculture
Definition
total population is involved in farming
scarcity of food/ low nutrition
no/ little mechanization
extremely low per capitia income
very few literate individuals
Term
nutrition
Definition
study of how the body's needs and mechanism of acquiring, digesting, transporting, and metabolizing nutrients
Term
Nutrient
Definition
substance in the diet that supports body function
Term
water
Definition
lubricates, regulates body temperature, solvent, transporting
needs met by drinking, eating, and metabolic reactions.
Term
Carbs
Definition
sugars, starches, cellulose
provides energy
cellulose found in forages
Term
proteins
Definition
long chains of amino acids
uses: lean tissues, enzymes, hormones, body metabolic reactions, heat , insulation, and protection
Term
Fat
Definition
esters of fatty acids and glycerol
source of energy and essential fatty acids
2.25 more energy of carbs
carry fat soluble vitamins
Term
Vitamins
Definition
Organic compounds that we only need small amounts of
Fat soluble
-regulate body functions
-uses: vision, clotting, tissue maintenance, growth
Water soluble
-metabolic reactions
Term
minerals
Definition
inorganic compunds that make up the bones and teeth
important in enzyme systems
serves in mineral/vitamin interrelations
maintain acid base balance
Term
Maintenance
Definition
maintaining constant weight and temperature
nutrients are needed for basal metabolism and normal movements
Term
Growth
Definition
Process on increasing body weight
body requires good-quality nutrients in relatively large amounts
Term
finishing
Definition
final growth and fattening phase
energy feeds are required
rely on carbs and fats because protein feeds are more expensive
Term
Production/Work
Definition
Output of products (eggs, milk, wool)
Output of actual work (packing mules, working dogs, horses, etc.)
Term
Reproduction
Definition
Least essential function
body condition is a good indicator of an animal's nutritional status
Term
Diet
Definition
Refers to the mix of feed ingredients to an animal
Term
Ration
Definition
refers to the amount of the diet fed of an animal in a 24 hour period
Term
Prehension
Definition
process by which the animal brings food into its mouth by bitting and grasping
Term
Mastication
Definition
Process of chewing food to mechanically reduce size of food particles.
ruminants typically regurgitate their food and rechew it
Term
salivation
Definition
the mixing of saliva with food during mastication
Term
deglutition
Definition
the passing of food to the stomach by peristaltic waves of muscle contractions
Term
Digestion
Definition
In stomach acid is secreted and mixed with the food to begin chemical breakdown of feed. Once food passes out stomach it enters the small intestine where further digestion and absorbance occurs.
Term
Small intestines
Definition
Duodenum: bile and pancreatic enzymes are secreted and is a major site of chemical breakdown of food
jejunum: longest part of the small intestines and the main function is a absorption
Ileum: some absorbance occurs but primarily it serves as a connection to the large intestines.
Term
Large intestines
Definition
function is to scvenage water, electrolytes, vitamins, minerals, and VFA's
Made up of the colon caecum and rectum
Term
Defecation
Definition
elimination of excrement from the body via the rectum
Term
Micturition
Definition
process of urination.
major way that excess nitrogen is excreated in the form of urea (mammals) or uric acid (birds and other)
Term
Rumen
Definition
the wall has many papillae (fingerlike projections), which aids in absorption.
Term
Ruminant
Definition
they like coarser feeds.
Term
Reticulum (honeycomb)
Definition
lies in front and below and is essentially an open compartment where microbial reactions happen.
Term
omasum (manypiles)
Definition
function is absorption of water and VFA's and reducing particle size of feed.
Term
Fore stomach
Definition
rumen, reticulum, and omasum
Microbial in the forestomach can utilize NPN (non-protein nitrogen)
Term
Abomasum (true stomach)
Definition
Stomach equivalent to simple stomach animals.
Term
Reticular or esophageal groove
Definition
it diverts milk directly from the esophagus into abomasums in the baby calf.
Term
Horse Digestion
Definition
N/A
Term
Stomach
Definition
small, constant feeding is nesscary
Term
Small intestines
Definition
major site of digestion and absorption of nutrients
Term
Large intestines
Definition
Microbial fermentation takes place
hindgut fermentor
VFA's absorbed and used for energy
microbial protein not utilized much by horse.
Term
Coprophagy
Definition
eating feces by horses usually die to severe protein deficient diet.
Term
Horses
Definition
are less efficient than ruminants in feed and therefore must have better quality feed (protein)
Term
Phenotype
Definition
The physical appearance on the animal. (it they have a horn or not)
Term
Genotype
Definition
The genetic makeup of the animal
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