Which of the following is derived from the ecotoderm?
A: epidermis, lenses of eyes, and nervous system
B: notochord, skeleton, and skin
C: liver, thyroid, and muscles
D: blood, respiratory system, and skeleton
A: epidermis, lenses of eyes, and nervous system
B: notochord, skeleton, and skin
C: liver, thyroid, and muscles
D: blood, respiratory system, and skeleton
举一反三
- (multiple choices)Which of the following statements about our nervous system are correct? A: Our nervous system includes the central nervous system and the peripheral nervous system. B: The central nervous system only contains our brain. C: The somatic nervous system is part of the peripheral system. D: The autonomic nervous system can be divided into the sympathetic and the parasympathetic system.
- (multiple choices)About our nervous system, which options are correct? A: Our nervous system includes the central nervous system and the peripheral nervous system. B: The central nervous system is only the brain. C: The somatic nervous system is one part of the peripheral system. D: The autonomic nervous system can be divided into the sympathetic and the parasympathetic system.
- Which is the most common cause to induce cardiac arrest in infants? A: Respiratory B: Cardiovascular C: Central nervous system D: Traumatic injury
- 中国大学MOOC: Which of the following is not the bone in the axial skeleton?
- Which of the following organ is not an accessory organ of the digestive system？ A: pancreas B: gallbladder C: liver D: esophagus