Tag Info

New answers tagged

2

Creatine is an important energy source for body, especially for the muscles, so it is no wonder you can finde it there. I don't think it has a special role besides that. See the Wikipedia article for more information. For bilirubin this is different, this substance is a breakdown product of the heme metabolism (basically hemoglobine). It is not water ...


0

Look at this scheme - As I stated before, vitreous is 99% water and is not an organ itself, thus the "replacement of vitreous" is actually = 99% water re-production and the only organ inside the eye which can perform this - ciliary body. Consequently, if the vitreous was removed and replaced by gas or saline it will be replaced by aqueous which produced ...


3

First of all, I should quote the sentence from the MOST reliable ophthalmology sourcing in the world - American Academy of Ophthalmology: Section 11 - "Lens and Cataract" "The equatorial diameter of the unfixed human lens measures 2 mm at 12 weeks and 6 mm at 35 weeks. Both the growth and the maturation of lenticular fibers continue throughout life." The ...


-1

With age your eyeball, as everything else in your body with time, actually shrinks. In the developing stages I'm not sure when it reaches its full size though. So this is why elder often report far sightedness, when they need reading glasses. This is because the image no longer falls on the retina perfectly. When you are near sighted your eye is actually too ...


4

No. In fact the lens of the eye, which is nearly optically perfect in humans, does not change or grow after it is fully formed around week 26 of gestation. Interestingly this is why one of the cues for identifying young children is having small faces with large eyes. This also the case for puppies and cats and other animals, who are mostly cuter when they ...


1

A fully patent foramen ovale (pfo) is rare however a partial or small pfo is present in about 30% of the population. Now the manifestations you described are partially correct. A pfo causes a left to right shunt in the adult whilst a right to left shunt in the fetus. In the fetus this is normal. In the adult, it is left to right because the left atrium is ...


4

I think CT is an abbreviation for connective tissue. Some examples of its use in that fashion: http://en.wikipedia.org/wiki/Connective_tissue http://www.vetmed.vt.edu/education/curriculum/vm8054/Labs/Lab5/Lab5.htm http://www.pitt.edu/~sshostak/biosci1450/hislec03.html


0

I think the excellent animation banks can be found by googling Japanese and Chinese animations with practical visualisations. See thread about searching Embryology in Japanese. Japan has the largest collection of embryos nowadays so it is good place to do research. I like this Japanese University database because slides are real and in chronological order. ...


1

Yes, the embryo would get that DNA mutation. Both sperm and egg are haploid, meaning they only have 1 copy of each gene. When the sperm fertilizes the egg, the resulting child is a diploid, meaning he/she has two copies of each gene. However, if the sperm was mutated, then child has one mutated copy of some gene(s). Depending on the gene(s) that are ...


2

I don't know of any database, but a short search brought up a few candidates. Depending on what you would like to see, they should be a good start: Human Embryology Animations Simbryo (Flash based) UNSW Embryology Embryological Development of the human Embryodynamics


1

This is by far too long for a comment, so as an answer: I spend now quite a while using Pubmed and other search tools, to find more information. The most recent article I found over and over again was the one from Juneja and colleagues: "Sequence divergence within the sperm-specific polypeptide TCTE1 is correlated with species-specific differences in sperm ...


1

Nevermind. While writing out the question I found the answer on wikipedia. Prostaglandin type PGF2α will act on the FP receptor to initiate uterus contraction which will help propel sperm further into the reproductive tract.



Top 50 recent answers are included