GROWTH DEV FARM ANIM
GROWTH DEV FARM ANIM ANS 3043
Popular in Course
Popular in Animal Science
This 2 page Class Notes was uploaded by Laury Kreiger on Friday September 18, 2015. The Class Notes belongs to ANS 3043 at University of Florida taught by Staff in Fall. Since its upload, it has received 12 views. For similar materials see /class/206674/ans-3043-university-of-florida in Animal Science at University of Florida.
Reviews for GROWTH DEV FARM ANIM
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 09/18/15
Notes 10 Fetal Growth Development and Physiology Fetal Nutrition nutrient priority goes to the fetus The mother will loose weight in order for the fetus to grow 1 Diet a Glucose in constant relationship with maternal glucose 1 Regulation is controlled by fetal insulin 2 Storage glycogen fructose and fats Lactate produced by placenta and supplied by fetus c Amino acids fetal concentration is greater than maternal concentration and is used for protein synthesis Fructose produced by the placenta from glucose and is in high concentration in the amniotic uid Oxygen oxygenated blood diffuses from maternal to fetal circulation and the amount is limited by the uterine ow 6 V Q V D V 2 Fetal Blood Flow a Placental and fetal circulation are one system b Fetal blood is shunted away from the lungs and liver to other tissues does not occur in postnatal animals 1 Ductus venosus shunts blood away from liver but not in pigs and horses 2 Foramen Ovale shunts blood away from right atrium to left atrium 3 Ductus arteriosus shunts blood from lungs to descending aorta c Fetal heart rate is greater than maternal heart rate 3 Gastrointestinal System and Renal System a Little function 4 Respiratory System a the last half of gestation the lungs begin to grow and the fetus spends 13 of its time making breathing motions 5 Endocrine System a in the last quarter of gestation the endocrine system starts to function hypothalamus pituitary adrenals pancreas gonads liver and thyroid The fetus modulates mineral metabolism and the adrenal gland initiates parturition Conceptus Growth general growth characteristics that are specific to a stage in gestation and the duration of that gestation 1 Tissue and organ growth are first followed by an increase in fetal mass along with an increased efficiency of placental transfer of nutrients 2 Fetal length increases early in gestation followed by an increase in fetal mass later gestation allowing for the development of the skeleton before the fetal mass increases look at relationships on statistical slide for fetal size 3 Early Growth day 090 relative to bovine model a sharp increase in amniotic uids b increase in embryo mass around day 61 small increase c very slow increase in fetal membranes amnion and chorion 63 V39 d cellular growth has primary hyperplasia division of cells which also gives an increase in the concentration of DNA e Genetic control is dominant which limits the variability in growth but birth weight differences have started and the environment and exogenous factors have little effect on the fetus f Nutrition is driven by early uterine histotroph that lasts from about day 060 The initial stages of placental attachment but the placenta provides inefficient nutrients at first from day 6090 relative to bovine model g Formation of the CNS heart limb buds organs and cartilage skeleton Mid Growth day 90180 in bovine a little increase in growth of fetus b fetal membranes and amnionic uid stay fairly constant c cellular growth hyperplasia cell division and hypertrophy increase in cell size are taking place d significant increase in placental surface area and increase in nutrient transfer across the placenta e constraints and external stimuli assume increased importance and environmental effects have an increased ability to effect the fetus both positively and negatively Late Growth day 180280 in bovine a big increase in fetal mass b increase in amnionic uid c slight increase in fetal membranes d cellular growth increasing hypertrophy for tissues and organs protein DNA ratios are increasing and decreasing hyperplasia for most organs but increasing for many tissues DNA content as a is decreasing e nutrition optimal placental transfer of nutrients due to an increase in placenta surface area 64
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'