The theory and practice of infant feeding, with notes on development, by Henry Dwight Chapin.

  • Chapin, Henry Dwight, 1857-1942.
Date:
1904
Catalogue details

Licence: Public Domain Mark

Credit: The theory and practice of infant feeding, with notes on development, by Henry Dwight Chapin. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    ANIMAL CELL—ITS CONSTITUENTS—GROWTH A PROCESS OF CELL DIVISION—YOUNG ANIMAL RUDIMENT OF PARENT. 2. The unit of the animal organism is the cell. In the cells all the vital processes take place. They are the chemical laboratories of the body and are the ultimate destination of all the food that is digested. The lowest forms of animals are single-cell animals. These single- cell animals carry on all of the chemical processes that highly organized animals carry on. Every part of a sin- gle-cell animal can digest food, every part can breathe^ every part can feel, and every part can think. All the faculties of an animal are bound up in one cell. The starting-point in the development of any animal is a sin- gle cell about one hundred and twenty-fifth of an inch in diameter. This cell divides and forms two cells, these divide, and so on. This increase in number of cells con- stitutes growth (Figs, i and 2). An organized animal, therefore, is a nation of cells, divided into many executive branches or organs. Certain organs are adapted for secur- ing food, others for digesting it, and others for throwing off waste products. Then there is the circulatory system that carries the necessary food to every cell in the body. All cells are in some way in communication with the blood supply and able to select from it food particularly suited to their needs. The cells of the bones select min- eral matter from the blood, other cells select other matter