Hormones | Back to Top. The endocrine system is a collection of glands that secrete chemical messages we call hormones. These signals are passed through the blood to arrive at a target organ, which has cells possessing the appropriate receptor. Exocrine glands (not part of the endocrine system) secrete products that are passed outside the body. Sweat glands, salivary glands, and digestive glands are examples of exocrine glands. The roles of hormones in selecting target cells and delivering the hormonal message.
Passport validity and the least six month rule. The requirement that a passport is valid for travel for six months beyond the holderâs stay in the United States is waived for certain nationalities, including British Citizens. Please visit 9 FAM 403.9 for more information .
Passport validity. Your passport should be valid for a minimum period of 30 days from the date of exit from South Africa. Your passport should have at least 2 blank pages when you present it at immigration to enter or leave South Africa.ew rules apply from 26 May 2014. If you live in South Africa, you must have valid residence permit in your passport when entering and leaving the country. Receipts issued by the Department of Home Affairs for applications to renew a permit will not be accepted by the immigration authorities.