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Air, like other gases, flows from a region with ________. A. Lower pressure to a region with higher pressure B. No pressure to a region with high pressure C. Little pressure to a region with high pressure D. Higher pressure to a region with lower pressure User: The long continuous tube that is the digestive tract is about ________ in length. User: Pulmonary ventilation is also referred to as ________. A. The lungs B. Gasping C. Breathing D. The bronchial ...
Weegy: Pulmonary ventilation is also referred to as C. Breathing User: The respiratory conducting passages are divided into the ________. A. Upper and lower respiratory tract B. Posterior and exterior respiratory tract C. Internal and external respiratory tract D. Left and right respiratory tract Weegy: A. Upper and lower respiratory tract User: Which organ is a part of the digestive system? A. Heart B. Kidneys C. Lungs D. Anus Weegy: D. Anus User: What is the exchange of gases between the lungs and the blood? A. Internal respiration B. Posterior respiration C. External respiration D. None of the above Weegy: c User: What is atmospheric pressure? A. Pressure of the air inside the body B. Pressure of the air outside the body C. Pressure of the air within one’s mouth D. Pressure of the air within one’s lungs Weegy: D. Pressure of the air within one’s lungs User: The endocrine system acts through chemical messengers called ________. A. Tissue B. Blood cells C. Neurotransmitters D. Hormones Weegy: D. Hormones (More)
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Expert Answered
Updated 8/13/2014 12:31:34 PM
2 Answers/Comments
The long continuous tube that is the digestive tract is about 9 METERS in length.
Added 5/18/2014 1:54:25 AM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by jeifunk [5/18/2014 1:58:18 AM], Rated good by jeifunk
External respiration is the exchange of gases between the lungs and the blood.

Added 8/13/2014 12:31:34 PM
________ causes contraction of the smooth muscle in the wall of the uterus. It also stimulates the ejection of milk from the lactating breast. A. Prolactin B. Gonadotropic hormone C. Oxytocin D. Antidiuretic hormone
Weegy: C. Oxytocin causes contraction of the smooth muscle in the wall of the uterus. It also stimulates the ejection of milk from the lactating breast. (More)
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Updated 1/23/2014 4:53:14 AM
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________ a synthetic opiate that blocks the effects of heroin and eliminates withdrawal symptoms, has a proven record of success for people addicted to heroin. A. Methadone B. Codeine C. Morphine D. Tetracycline
Weegy: A. Methadone User: Inhalant abuse can cause death by ________. A. Asphyxiation B. Suffocation C. Seizures D. All of the above Weegy: A. Asphyxiation will cause suffocation or seizures User: Marijuana increases heart rate by ________ percent shortly after smoking; this effect can last up to 3 hours. A. 50 B. 75 C. 20-100 D. 10 Weegy: C. 20-100 User: An estimated ________ (12 percent) aged 12 or older reported driving under the influence of alcohol at least once in the past year. A. 1.2 million people B. 60.2 million people C. 30.2 million people D. 15.2 million people Weegy: A. 1.2 million people (More)
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Asked 9/8/2012 3:02:05 PM
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