There are more than six billion humans who all share the same basic structure. Scientists categorize body parts by function. There are many systems such as the cardiovascular system, the respiratory system, the digestive system, the urinary system, and the endocrine system. The body is an amazing machine, and these are just a few of the parts!
To understand why humans are the way they are, look at cellsâ€”especially the material in the center, called chromosomes. People have 23 pairs of chromosomes, so each cell has 46 in all. Parents pass chromosomes to their children. DNA carries the genetic information in alleles and is the blueprint for the cells of an organism. DNA tells one's body how to put certain materials together to produce certain traits.
Come and get it! This book compares the different ways food is grown, harvested, and stored throughout history as well as the properties of growing and selling food. Take this mouth-watering journey packed with vocabulary related to food preparation and distribution.