Human body of different cavities, separated areas which house different organ systems. The brain and central nervous system reside in an area protected from the rest of the body by the blood brain barrier. The lungs sit in the pleural cavity. The intestines, liver, and spleen sit in the abdominal cavity Height, weight, shape and other body proportions vary individually and with age and sex. Body shape is influenced by the distribution of muscle and fat tissue. Human physiology is the study of how the human body functions. This includes the mechanical, physical, bioelectrical, and biochemical functions of humans in good health,
Sylvian Joululaulu Sylvian Joululaulu Sylvian Joululaulu (Swedish: "Sylvias hälsning från Sicilien"), "Sylvia's Christmas Song", is a poem by Zachris Topelius from 1853, which was composed to a christmas carol by Karl Collan. The poem has been translated to Finnish by both Elina Vaara and Martti Korpilahti, and the latter one from 1918 is one of the most beloved Finnish christmas carols. It has been chosen as the best Finnish christmas carol in the 1960s and again in 2002 in a poll by Yleisradio. The poem is a part of the collection "Sylvian laulut": Sylvia, or Eurasian blackcap, ("Sylvia atricapilla"), is a migratory