1, stomach removal: located in the first half of the crab shell, with or without mud, where bacteria grow and multiply.

2. Intestine removal: it is located in the middle of the navel of the crab, showing a black line.

3, except crab heart: located in the middle of crab roe

4, in addition to gills: both sides of the crab, with more pathogenic bacteria and dirt.

Extended data:

Edible taboo

It was found that the infection rate and degree of metacercaria of Paragonimus larvae in live crabs were high. Paragonimus parasitizes in the lungs, which stimulates or destroys lung tissue and can cause cough and even hemoptysis. If it invades the brain, it will lead to paralysis.

According to the investigation of experts, the infection rate of paragonimiasis is 20% after eating crabs slightly heated, 55% after eating pickled crabs and drunken crabs, and 7 1% after eating raw crabs. Paragonimus metacercariae is very resistant, and it can be killed in water at 55℃ for 30 minutes or in 20% salt water for 48 hours.

If you eat crabs raw, you may be infected with Vibrio parahaemolyticus. When Vibrio parahaemolyticus invades the human body in large quantities, infectious poisoning will occur, showing symptoms such as intestinal inflammation, edema and congestion.

Pregnant women are not allowed to eat crabs, and they should not eat crabs throughout pregnancy.

Crab meat is delicious and nutritious, containing a lot of protein and fat, and more substances such as calcium, phosphorus, iron and vitamins. Every 500g crab contains 49.6g of protein, 9.3g of fat, 27.2g of sugar, 0/.088mg of phosphorus/kloc-,33.6mg of iron and proper amount of vitamin A, etc. It is both a tonic and a delicious food, and it is very popular with people. It is usually the main course of a wedding reception. But not suitable for pregnant women.

Crab is not only delicious, but also a medicine. Common hairy crabs, hairy crabs, sea crabs, lake crab, river crabs and river crabs. Crabs are mainly used for food, mostly river crabs.

"Pearl Capsule Supplement" says that crabs can cure heat and bind the chest, yellow can turn paint into water, and claws can break blood and have an abortion. It is recorded in the "Leigong Pot Medicine Solution" that crabs treat blood stasis, replenish qi and nourish essence, and relieve chest heat and boredom. Punching lacquer sore can be used to treat traumatic injury, broken tendon fracture, congestion and swelling, postpartum congestion and abdominal pain, dystocia and retained placenta. 60 grams of crab claws, supplemented by yellow wine, decocted in water, and then added with donkey-hide gelatin, is the medicine for induced abortion.

In view of the above medicinal properties, pregnant women should not eat more crabs If they breastfeed the baby during childbirth, it may also affect the baby. Pregnant women with habitual abortion should avoid eating.

References:

Baidu encyclopedia: crab