The ________ is the site of early blood cell formation.
Fill in the blank(s) with the appropriate word(s).
yolk sac
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This figure shows an anterior view of the spinal cord and meninges. What structure does number 3 indicate?
A. Gray matter B. Pia mater C. Dura mater D. White matter E. Arachnoid
Ovaries are about the size of small grapefruits.
a. true b. false
Answer the following statements true (T) or false (F)
1. Hair that is frequently cut or shaved will grow in faster and darker than it would if it had not been cut or shaved frequently. 2. The small pores in the skin of the face can be outlets for either eccrine or apocrine glands. 3. When the body is cold, blood vessels in the skin dilate and allow more blood to come through to warm up the skin.
Which sequence is correct for the following events?
1. fibrinogen ? fibrin 2. clot retraction 3. formation of thromboplastin 4. prothrombin ? thrombin A) 3, 4, 1, 2 B) 1, 2, 3, 4 C) 4, 3, 1, 2 D) 3, 2, 1, 4