Human Reproduction And Fertilization Chapter 4 Pregnancy

Front 1

Define Oogenesis

Back 1

developmental process by which the mature human ovum is formed; haploid (23) number of chromosomes.

Front 2

Define Spermatogenesis

Back 2

formation of mature function spermazoa; haploid (23) number of chromosomes.

Front 3

Define Meiosis

Back 3

a process of two successive cell divisions, producing cells, egg or sperm, that contain half the number (23) of chromosomes in somatic cells (46).

Front 4

Define Metosis

Back 4

type of cell division of somatic cells in which each daughter cell contains the same number of chromosomes as the parent cell

Front 5

What is a haploid number of chromosomes?

Back 5

23-possessing half the diploid or normal number of chromosomes, i.e. 46, found in somatic or body cells.

Front 6

Describe the process of fertilization:

Back 6

Union of ovum and spermatozoan; usually occurs in the fallopian tubes within minutes or no more than a few hours of ovulation; most pregnancies occur when intercourse occurs 2 days before, or on day of ovulation.

Front 7

Name the stages of development for the fertilized ovum:

Back 7

1. Zygote
2. Basotmeres
3. Morula
4. Balstocyst
5. Embryo
6. Fetus

Front 8

Define zygote:

Back 8

a diploid cell with 46 chromosomes that results fromt he fertilization of the ovum by the spermatozoan

Front 9

Define blastomeres:

Back 9

Mitotic division of the zygote (clevage) yields daughter cells called blastomeres

Front 10

Define Morula:

Back 10

The solid ball of cells formed by 16 or so blastomeres; mulberry like ball of cells that enters the uterine cavity 3 days after fertilization.

Front 11

Define Blastocyst:

Back 11

after the morula reaches the uterus, a fluid accumulates between blastomeres, converting the morula to a blastocyst; inner cell mass at one pole to become embryo; outer cell mass will be trophoblast.

Front 12

Define Embryo:

Back 12

Stage in prenatal development between the fertilized ovum and the fetus, i.e. between second and eighth weeks inclusive

Front 13

Define Fetus:

Back 13

Developing conceptus after the embryonic stage.