During swallowing:
1.all processes are consciously controlled.
2.the swallowing center located in the medulla oblongata inhibits the medullary respiratory center.
3.the vocal folds are relaxed.
4.the food bolus is forced down the esophagus by gravity.
2
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The ________ is the part of the digestive tract that has the most lymph nodules and bacteria.
A. duodenum B. jejunum C. colon D. ileum
The inferior one-third portion of the uterus that projects into the vagina is the
A) isthmus. B) vaginal fornix. C) fundus. D) body. E) cervix.
Cartilaginous skeletons are found in
A) Lampreys. B) Hagfish. C) Sharks and rays. D) All of the above
These cells of the seminiferous tubule nourish the spermatids as they develop into sperm
A) follicle cells B) interstitial cells C) granulosa cells D) sustentocytes