What organ in the digestive system contains hydrocloric acid?

Can lack of sleep causes numbness of the head? What is defect yield? Where does renal artery come from? What are the risks involved with prolonged exercise during pregnancy? Where is polio most common? What type of blood has a lobed shape? What type of muscles line the bladder to allow for contractions? Does the age when getting pregnant have anything to do with autism? What emergency responses would typically be used by workplaces How would you rank or prioritize these responses? What is painful labor and delivery called? Can you get sores on your back if you dont wash well? If you gain weight is it normal for breasts to be sore? Is yellow teeth Hereditary? Why Does Left leg twitch when you sit down? Balls dirty because I haven't washed them as it feels weird to wash them Any tips? What happens if your allergic to condoms? What are three antiretrovirals? Does rubbing bruises help them go away? What habitat do yeasts need to survive? What components are needed for platelets to form a sticky clot?