1 Mrs Lane said that there are only 5 pints in a person and she was a science teacher!!!! She needs to be sacked nowww! 2  Your teacher would have meant 5 litres which is about 8 pints.  I've always been told there was 12 litres of blood in the human body, and I never questioned it.
A. The endocrine system is made up of the cells, tissues, and organs that secrete hormones into body fluids. The body has two kinds of glands, exocrine (secretes products into ducts) and endocrine (secrete products into body fluids).
An apocrine gland loads the products into a vesicles which buds from the cell (ex. mammary gland). A merocrine glad secretes its products in an extremely similar way; it uses exocytosis, which almost always utilizes an excretory vesicle (ex. merocrine sweat glands). I don't know how eccrine differs, but I know that there are eccrine sweat glands, which are more common than merocrine sweat glands.