PART 6. RESPIRATORY SYSTEM A. Following the trachea down through the neck, notic
ID: 102286 • Letter: P
Question
PART 6. RESPIRATORY SYSTEM A. Following the trachea down through the neck, notice where it passes behind the heart and into the major respiratory organs, the lungs. QUESTION 1: What is the function of the lungs in the fetal animal? In the adult animal? B. Posterior to the lungs and forming the division between the thoracic and ab- dominal cavities is the muscular diaphragm. QUESTION 2: What is the function of the diaphragm? PART 7. DIGESTIVE SYSTEM Follouing the esonhagus (food tube) from the neck region, and using FiguresExplanation / Answer
Answer:
1. The lungs are nonfunctional in a fetal pig. The placenta performs the function of gas exchange. The deoxygenated blood flows to the placenta, gets oxygenated and then returned to the fetus via umbilical cord.
In adults, the lungs perform the function of gas exchange.
2. The diaphragm in a fetal pig functions like it would function after birth. It contracts to draw amniotic fluid into the lungs and expands to expel it.
3. The small sac attached to the cecum in humans is the appendix. The appendix has no known function.
4. The spleen helps spot infections and filters out red blood cells that are damaged or old. But, overall the organ has been considered nonessential since people continue to live without the spleen.
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