The formation of reptile shell color, what kind of reptile is this? Why is the shell this color

Studies have shown that eggshell color has high heritability, and eggshell color is inherited from 0 58 0 76. Moreover, the shell color trait is affected by multiple genes, and the color of the turtle eggshell is relatively fixed, because the eggs are buried and naturally hatched and do not need protective color, so they are basically chalky. When late incubation or when the embryo dies, the spoiled protein infiltrates the eggshell, forming yellow-brown, grayish-white, and grayish-black spots.

Turtle eggshell color is a pigment secreted and deposited by glands in the uterus, which is one of the constituent components of the enamel layer on the outside of the eggshell and is formed 4 to 5 hours before the egg is laid. When the egg passes through the mucosa of the uterus, the lumen expands, and due to the contraction of the smooth muscles of the uterine wall, the egg turns, and the secretions of its epithelial mucosa are evenly coated on the surface of the egg. Secretory cells are associated with the secretion of the eggshell enamel layer, due to the presence of tubular glands in the membrane, which open directly into the lumen.

The biosynthetic pathway and mechanism of eggshell pigment in turtles is complex, and its chemical composition is pigment porphyrin, which is a hemoglobin decomposition product and is associated with the destruction of aging, damaged and morphologically abnormal red blood cells. When red blood cells are engulfed and destroyed in the reticuloendothelial system of the liver, spleen, and other parts, hemoglobin is released, which is quickly broken down into globin, biliverdin, and iron. Among them, globin and iron can re-participate in the metabolism in the body, only biliverdin is reduced to bilirubin, which is transferred to the liver through the blood and combined to produce bilirubin glucuronate, which is excreted into the duodenum with bile, and most of it is excreted from the body as waste products with feces.

A small part is reabsorbed by the intestine and transferred to the liver or to the fallopian tubes and other parts through the bloodstream as a raw material for the synthesis of eggshell pigment. Because the aging and destruction of red blood cells is continuous, this pigment raw material will not be lacking, but can be continuously satisfied by the above-mentioned decomposition substances, and then through the action of multiple decomposition synthases in the cells of the uterine gland, eggshell pigment is formed.

The color of the shell depends on its genes!

The so-called pigmentation can be understood as the change of color due to food, light, exercise, etc.!

For example, wild sulcatas are mostly yellow, while captivity is mostly black and brown due to the lack of high-quality light and exercise!

The color of the turtle shell is the result of pigmentation in the body.

The main thing is light, followed by food, and exercise is also very important.

Chlorophyll, astaxanthin, crab red, bovidanvin, be satisfied!

The African giant snail, also known as the brown cloud agate snail, (scientific name: achatina fulica) is a medium-to-large terrestrial snail. The adult shell is generally 7 8 cm long, and the maximum can grow to more than 20 cm.

Nocturnal, omnivorous, mostly active in humid environments, preferring to be seen in rain and at night. Usually hide in a cool place, and make a layer of white film (false mouth cover) on the shell mouth, leaving only a small hole to breathe, shrink the snail meat into the shell to prevent dehydration, and wait until the environment improves before coming out.

Snails, there are this color.

Snails: This is the kind that eats crops in the field.

In fact, the egg in zoology is a broad concept, which refers to both the entire amniotic egg laid by reptiles and birds, and the egg cells laid by lower animals. Needless to say, the size of the eggs is different from the color and patches of the egg shell. The eggs laid by reptiles are generally nearly spherical in shape and have elastic shells.

I've seen the sea turtles laying eggs on TV) Other lower animals directly lay egg cells, and the egg cells are generally small (those oviparous sharks are larger), and the color is mostly transparent. Theoretically, it should be produced in a liquid environment. Zoological books generally say that reproduction is freed from water until the amniotic egg appears, but terrestrial arthropods can generally lay eggs on land.

For example, after laying eggs, spiders will wrap their eggs in silk to form egg cocoons; Some of the eggs laid by insects are covered with prostate secretions, forming a water-retaining egg mass.

Snails are not reptiles, they are mollusks... Snakes, lizards, or something to call reptiles...

Agate snail A type of snail.

Snails, the breed is different.

Sister, you don't even know a snail, do you?