A pseudocoelom lacks( ).
A: peritoneum and mesenteries
B: muscles
C: a digestive tract
D: excretory organs
E: reproductive organs
A: peritoneum and mesenteries
B: muscles
C: a digestive tract
D: excretory organs
E: reproductive organs
举一反三
- Which of the following are the excretory organs of insect? A: Malpighian tubules B: integument C: digestive tract D: tracheal system
- Which of the following organs is parenchymal organ？ A: blood vessel B: digestive tract C: ureter D: lung
- The organs that are both reproductive organs and endocrine glands are<br/>____. A: thyroid and parathyroid glands B: testes and ovaries C: male gonads only D: human growth hormone
- In this passage we can see the motions of various muscles that are connected_________. A: with our motional organs such as foot and hand B: with our neural connective organs C: with our craniums and upper part of our body D: with the artery and veins in our body
- A sheet or band of fibrous tissue which lies deep to the skin or forms an investment for muscles and various organs of the body is ______.