II. Growth of lungs into the body cavity and development of the diaphragm. 1  lateral folding of the body wall encloses the foregut endoderm such that it is suspended within the intraembryonic coelom (or body cavity) by a sling of dorsal mesentery, which is mesoderm derived.
PayPal make money through following type of transactions. 1  2.9 to 3.9 % per transaction - each time a transaction happens on any website PayPal charges 2.9% for domestic transaction and 3.9% to international transaction. 2  3 to 5% on currency conversion charges - i.e. converting USD to INR or Converting USD to GBP etc.
The other way PayPal earns profit is by earning interest against the money that you have sitting in your account. Knowing that there are over 100 million members on PayPal, if every member kept $5 in their account for a year and PayPal gets an interest rate of 1.75%, they would make $8,750,000 a year. The person who owns the account does not make any interest by letting their money sit in there.