Question

What distinguishes the yolk sac from the allantois?

What distinguishes the yolk sac from the allantois?

Homework Answers

Answer #1

The allantois is the sac-like extraembryonic membrane that removes waste from the embryo. As the embryo grows, so does the allantois, eventually pressing against the chorion. This allows the allantois to exchange oxygen and carbon dioxide with the air outside the eggshell. In addition, the allantois also serves as a disposal site for uric acid.

The yolk sac is the extraembryonic membrane that surrounds the egg yolk. The yolk sac has a well-developed vascular system that transports nutrients from the egg yolk to the developing embryo.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Why is the relative size of the yolk sac in a mammal egg much smaller than...
Why is the relative size of the yolk sac in a mammal egg much smaller than that found in an amniotic egg? The yolk sac is relatively smaller in the mammal because its function in an amniotic egg (source of nutrients) has been taken over by the placenta. Amniotic eggs require larger yolk sacs to support longer maturation times compared to mammal eggs that develop more quickly. The embryos of animals with amniotic eggs like reptiles are larger than the...
What distinguishes active transport from passive transport
What distinguishes active transport from passive transport
What distinguishes secondary from primary data? How can they work together?
What distinguishes secondary from primary data? How can they work together?
What distinguishes a natural monopoly from other monopolies? What are the pros and cons of regulating...
What distinguishes a natural monopoly from other monopolies? What are the pros and cons of regulating natural monopolies? Does your answer differ depending on the specific product or industry being regulated?
Sometimes, diploid cells in the integument surrounding the embryo sac form another diploid embryo sac. The...
Sometimes, diploid cells in the integument surrounding the embryo sac form another diploid embryo sac. The second embryo sac Select one: a. develops into a deformed embryo and seed. b. forms a normal embryo and seed that is a clone of the parent. c. forms an embryo and seed with a 3n, rather than a 2n, chromosome number. d. forms a normal embryo and seed that are genetically different from the parent. e. dies, because it did not originate from...
Describe quantitative easing as a tool of monetary policy? What distinguishes it from the other policy...
Describe quantitative easing as a tool of monetary policy? What distinguishes it from the other policy tools of the Federal Reserve? What was the Fed's objective in implementing quantitative easing?
1. What distinguishes a merchandising business from a service business? Give some examples.
1. What distinguishes a merchandising business from a service business? Give some examples.2. Is a restaurant a service business or merchant, or is it an example of both?
Does corporate financial policy matter in a perfect financial market? What distinguishes an integrated from a...
Does corporate financial policy matter in a perfect financial market? What distinguishes an integrated from a segmented capital market?
What distinguishes an ‘experiment’ from other types of ‘scientific studies’ (e.g., descriptive studies or case analyses)?
What distinguishes an ‘experiment’ from other types of ‘scientific studies’ (e.g., descriptive studies or case analyses)?
Explain what is the fundamental characteristic that distinguishes the short-run from long-run of perfectly competitive market?
Explain what is the fundamental characteristic that distinguishes the short-run from long-run of perfectly competitive market?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT