Chapter 17: Lesson 1-4 Flashcards
Egg cell
The reproductive cell that joins with a sperm cell to make new life
Fertilization
The joining together of a sperm cell and a egg cell to become one
Sperm cell
The cell that enters through the egg cell during fertilization
Uterus
A pear shaped organ in the mothers body where the embryo is nourished and protected
Embryo
The organism from fertilization to the eighth week of development
Fetus
The organism that’s developing from end of eighth week to birth
Placenta
Thick rich tissue that lines the walls of the uterus during pregnancy that nourishes the fetus
Umbilical cord
A tube that connects the placenta to the fetus
Cervix
The entry to the uterus
Heredity
The passing of traits from parents to children
Chromosomes
Threadlike structures within the nucleus of a cell that have the codes for inherited traits
Genes
Basic units of heredity
Genetic disorder
A disorder caused partly or completely by defect in genes
Environment
Sum total of a persons surroundings
Prenatal care
Steps taken to provide for the health of a pregnant female and her baby
Birth defects
Abnormalities present at birth that cause physical or mental disability or death
Developmental tasks
Events that need to happen in order for you to grow toward being a healthy mature adult
Infancy
First year of life
Toddlers
Children between the ages of one and three who are learning to walk and talk
Preschoolers
Children between ages of tree and five
Puberty
The time when you start developing physical characteristics of your gender
Chronological age
Age measured in years
Biological age
Age determined by how well certain body parts are working
Social age
Age measured by your lifestyle and how you get along with others
