the pathway coming to the lungs are veins and the ones going away from the lungs are the arteries :)
Models are simplified representations of of different complex systems. They also help to study very small or large objects.
Option B, D and E.
Explanation:
Models are very simplified representations of complex systems and organs or structures which are prepared to study those systems by scientists and normal people easily. Many structures of human body like cells or some tissues are very small in structure or microscopic in nature. So studying them are very hard without specific instruments which are not always available. Thus models are made to easily study those structures by scientists and even normal people and students.
The density of water is approximately 1.0g/mL
6.7g * 1 mL/ 1g = 6.7 mL
"<span>sleepy or passive"
A drug that leaves an individual sleepy and passive won't likely lead to any violence. These are called h</span>ypnotic or sedative drugs. These drugs are mostly <span>benzodiazepines. They serve to calm and relax an individual and help in cases of insomnia, anxiety or anaesthesia. These drugs' effect is also dose-dependent which means that the more it is taken, the strongest/longest the effect.</span>
