Human body to comparative physiology and ecophysiology. Most recently, evolutionary physiology has become a distinct subdiscipline. Human body The human body is the structure of a human being. It is composed of many different types of cells that together create tissues and subsequently organ systems. They ensure homeostasis and the viability of the human body. It comprises a head, neck, trunk (which includes the thorax and abdomen), arms and hands, legs and feet. The study of the human body involves anatomy, physiology, histology and embryology. The body varies anatomically in known ways. Physiology focuses on the systems and organs of the human
The Body Snatchers The Body Snatchers The Body Snatchers is a 1955 science fiction novel by American writer Jack Finney, originally serialized in "Colliers Magazine" in 1954, which describes real-life Mill Valley, California (called in the original film by the fictional name of "Santa Mira") being invaded by seeds that have drifted to Earth from space. The seeds, grown from plantlike pods, replace sleeping people with perfect physical duplicates with all the same knowledge, memories, scars, etc. but are incapable of human emotion or feeling. The human victims disappear forever. The duplicates live only five years and cannot sexually reproduce; consequently, if unstopped,