Fluid that collects in tissues is returned to the bloodstream by the
A. excretory system.
B. digestive system.
C. lymphatic system.
D. vascular system.
E. endocrine system.
C. lymphatic system.
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You dissect a specimen of a vertebrate during an anatomy laboratory. It has the following characteristics: lungs, abundant blood capillaries under thin skin, a partially-divided heart, a pulmonary circuit, and four walking legs. What is this animal?
A. lungfish B. amphibian C. reptile D. placental mammal E. marsupial mammal Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about amphibians? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Cardiac output may be increased by a
A. greater-than-normal heart rate. B. lower-than-normal stroke volume. C. lower-than-normal stroke volume and heart rate. D. greater-than-normal stroke volume. E. greater-than-normal stroke volume and heart rate.
The human body has close to __________ muscles
a. 100 b. 206 c. 300 d. 500 e. 700
Molecular sequencing suggests that mitochondria arose from a group of prokaryotic organisms within the
A) Crenarchaeota. B) cyanobacteria. C) iron-oxidizing bacteria. D) Proteobacteria.