APSC Lesson 15

2 phases of growth

prenatal and postnatal

prenatal

development of tissues, organs, skeletal system, etc

postnatal

muscle growth, primarily hypertrophy

prenatal muscle growth

mainly hyperplasia

hyperplasia

increase in fiber muscle

hypertrophy

increase in fiber size

accretion

growth or enlargement by gradual buildup

average daily gain

(end weight - start weight) / days between weights

weight per day of age

animal weight / days of age

maturity is reached when the curve:

flattens

a steeper curve means that:

the animal is more profitable

muscle

fastest early in life, slows down when animals reach maturity (unless put in a strength training program)

bone

decreasing rate, mostly complete by puberty and happens the fastest around birth

fat

grows the fastest around maturity

intra-abdominal fat

first fat thats deposited, its in the abdominal cavity and helps cushion organs. Very important for protecting organs but its tossed out in slaughterhouses

subcutaneous fat

fat that sits underneath the skin, called back fat and is the largest amount of fat deposited

Intermuscular fat

seam fat, fat that sits in between muscles

intramuscular fat

fat thats within the muscle, marbling