The gout crystals, formed from uric acid, can be seen under human skin in this specimen. Second field showing gout crystals from the same human specimen. (TM: 100x, picture taken with a Zeiss 10x Planapo on a Sony A7ii) Continue reading Gout Crystals in Human Skin
The large intestine is the penultimate portion of the digestive tract, between the small intestine and the rectum. The muscularis externa layer continues to separate into the circular and the longitudinal layer, with the exception that the longitudinal layer forming … Continue reading Large Intestine
The fallopian tube is also known as the oviduct or the uterine horn. The shape of the lumen changes throughout its path between the fimbriae and the uterus; the parts of the tube are known as the infundibulum, ampulla, and … Continue reading Fallopian Tube
If no implantation occurs or after the placenta is established, the corpus luteum would undergo involution and become a mass of connective tissue known as corpus albicans. Due to the activity of the macrophages, they will eventually become acellular scars, … Continue reading Corpus Albicans
After ovulation, the remaining follicular cells (both theca and granular cells) transform into a temporary endocrine structure called the corpus luteum (yellow body). It produces progesterone that maintains the endometrium for implantation of the blastocyst. This picture shows a corpus … Continue reading Corpus Luteum
Low magnification picture showing the human nasal septum. The hyaline cartilage forming the septum can be seen clearly at this magnification. Continue reading Human Nasal Septum
Low magnification picture showing the differences (and similarities) between an artery and a vein. Continue reading Artery vs. Vein
The most unexpected of observations: a snowy owl (Chinese name is 雪鴞) in Orange County, Southern California! Thanks to CNN for the tip. Continue reading Snowy Owl
First observed at San Joaquin Wildlife Sanctuary. This bird was loud! Continue reading California Thrasher
First observed at San Joaquin Wildlife Sanctuary Continue reading Blue-gray Gnatcatcher
Kit Ng, Ph.D. 