Question

2.1 functionally, how is the larynx in humans different than in birds?
2.2 number the following organs in the order that represents the correct path of food through the digestive tract of a bird:
cloacal opening
small intestine
crop
proventriculus
mouth
large intestine
esophagus
gizzard
coprodeum
2.3 which side of the female reproductive tract is functional in birds?
2.4 do birds possess a urinary bladder? how is this adaptive?

Explanation:

2.1: In humans, the larynx is mainly for vocal - ization and airway protection. In birds, the syrinx (not the larynx) is the vocal organ, and the larynx mainly functions in respiration and protecting the airway.
2.2: The correct order of food - passage in a bird's digestive tract: mouth, esophagus, crop, proventriculus, gizzard, small intestine, large intestine, coprodeum, cloacal opening. So the order is 8, 6, 3, 4, 1, 7, 5, 9.
2.3: In most birds, only the left side of the female reproductive tract is functional.
2.4: Birds do not possess a urinary bladder. This is adaptive as it reduces their body weight, which is beneficial for flight.

Answer:

2.1: In humans, larynx is for vocalization and airway protection; in birds, larynx is mainly for respiration and airway - protection, and syrinx is for vocalization.
2.2: 8. cloacal opening, 6. small intestine, 3. crop, 4. proventriculus, 1. mouth, 7. large intestine, 5. esophagus, 9. gizzard, 2. coprodeum
2.3: The left side.
2.4: No. Reduces body weight for flight.