<span> Nose or mouth --> pharynx (throat) --> larynx --> trachea (windpipe) --> mainstem bronchus (right and left) --> bronchioles--> alveoli
</span>
Well, I dont think they had model numbers back then but I will look on the web for what microscopes where used. I found something but it doesnt say anything about a model of microscope! Here is the fact. <span>The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name. However what Hooke actually saw was the dead </span>cell walls of plant cells (cork) as it appeared under the microscope. This was taken from google, I hope this helps? Here is the link : http://bitesizebio.com/166/history-of-cell-biology/
Answer:
The side groups are what make each amino acid different from the others. Of the 20 side groups used to make proteins, there are two main groups: polar and non-polar. These names refer to the way the side groups, sometimes called "R" groups, interact with the environment.
Explanation:
The answer is Ependymal cells. They line the ventricles of
the brain and central canal of the spinal cord and secrete the cerebral spinal fluid (CSF). These cells are cuboidal to columnar and have
cilia. In addition to the function of circulating
the CSF, the also increase the surface area
for the absorption of the CSF.
Answer:
Erythrocytes are not considered true cells, because of their lack of a nucleus. The effect of having no nucleus makes their self-reproduction impossible, and the absence of mitochondria is a disadvantage because they have to obtain energy by alternative reactions.
Explanation:
Erythrocytes, or red blood cells, are the structure in charge of transporting gases in the blood. When these cells are mature, they have already lost their nucleus —in order to have space to house the hemoglobin molecule— which prevents mature red blood cells from being able to reproduce.
Additionally, red blood cells do not have mitochondria —the main energy generator in eukaryotic cells— so in order to obtain energy they need to perform lactic fermentation, with a lower enegetic yield, which may be a disadvantage, but sufficient for this structure to perform its function.