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Home Q & A Board Biology-Related Homework Help General Biology
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vr vr
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6 years ago
Four of the five answers listed below are components of the human respiratory system. Select the exception.
 
  a. thoracic cavity
  b. trachea
  c. diaphragm
  d. spiracle
  e. larynx

Question 2

Which have a collagen cuticle, a pseudocoelom, a tubular digestive system and no respiratory or circulatory organs?
 
  a. roundworms
  b. cnidarians
  c. flatworms
  d. annelids
  e. porifera
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katkatkatkatkatkat
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6 years ago
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vr Author
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6 years ago
Thank you for helping me throughout this difficult semester
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