This figure shows the muscles of respiration. What muscle does number 2 indicate?
A. External intercostal
B. Internal intercostal
C. Scalene
D. Diaphragm
E. Transversus thoracis
A
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What valve prevents the backflow of blood from the right ventricle into the right atrium?
A) pulmonary valve B) bicuspid (mitral) valve C) aortic valve D) tricuspid valve
The right ventricle has the thickest wall of the four heart chambers
Indicate whether the statement is true or false
The renal arteries supply blood to the legs
Indicate whether the statement is true or false
What is the significance of the occipital condyles?
A. They articulate with the mandible, to allow for chewing movements. B. They are passageways for the internal carotid arteries. C. They articulate with the zygomatic bone, to form a support structure for the cheek. D. They provide a bony support structure for the pituitary gland. E. They articulate with the first cervical vertebra, to allow head movements with respect to the neck.