Long Test 1 Files and Quicklinks

It’s that time of the quarter again. Please bring your notebooks on LT day: Thursday for Cs and Friday for Rb. Be sure to accomplish the exam format specified on the bulletin board BEFORE the actual exam.

Study smart!

• Coverage of the exam in order of decreasing importance: Digestive System, Tissues, Multicellularity and the Volvocine Series, Hierarchy of Biological Organization, and Lab Activities
• Type of exam: Multiple Choice, Odd-Man Out, Modified True or False, and Short Answers Only

For your cramming reviewing pleasure:

1. Hierarchy of Biological Organization
2. Volvocine Series and Multicellularity
3. Plant Tissues
4. Animal Tissues
5. DIgestion in Lower Forms
6. Digestion in Man

I am also available for online consultation if you need help. Just add up my ym id!

Baby breathing

This is in response to the question raised by Cs regarding babies being able to breathe and swallow at the same time. Yes, babies up to 3-6 months of age are able to breathe while swallowing milk, a feat that we are no longer capable of. The best online explanation of this can be found here.

If you take a look at the picture of an adult larynx, you will notice that it is located on top of the trachea and below the pharynx. In babies, the larynx is located much higher in the throat so that the milk they drink actually drips down the sides and into the esophagus, leaving the entrance to the trachea free for the passage of air. This also explains why babies can only make limited sounds. Later in life, the larynx descends leaving us with the epiglottis as our guardian against choking and the ability to make more diverse sounds.