A&p 2 Chapter 36

Front 1

HCG

Back 1

Large amounts in early pregnancy peaks about eight to nine weeks in a continuous low level at 16 weeks stimulates the production of estrogen and progesterone

Front 2

Placenta

Back 2

As a placenta develops it secretes is on estrogen and progesterone after about 3 months the corpus luteum has to generated in the placenta has completely taken over the job of circulating estrogen and progesterone

Front 3

Trimesters

Back 3

The length of pregnancy about 39 weeks call gestation period is divided into three approximately 3 months segments called trimesters the first trimester extends from the first day of the last menstrual period to the end of the 12th week

Front 4

Second trimester

Back 4

The second trimester extend from the 12 week to the 28th week of pregnancy

Front 5

Third trimester

Back 5

The third trimester extended from the 28th week of pregnancy until the baby is delivered several terms such as embryo and fetus are used to describe the stages of development during the three trimesters of pregnancy

Front 6

Embryonic phase

Back 6

The embryonic phrase of development extends from fertilization until the end of week 8 of gestation during this period in the first Prime Minister they turn embryo is used to describe the developing individual the fetal face is used to indicate the development extending from weeks 8 to 39

Front 7

Limb buds

Back 7

But a 35 of gestation the heart is beating and although an embryo is 8 millimeters long the eyes and so-called limbo which ultimately from the arms and legs are clearly visible

Front 8

Month 4

Back 8

Bummer for all organ systems are formed and functioning to some extent growth of the embryo to 4 months

Front 9

Stem cells

Back 9

Skin cells are on specialized cells that reproduce to form Pacific lines of specialized cells at this stage they have their highest Dennis or potency that is there capable of producing many different sales

Front 10

Totipotent

Back 10

Scientist called the single cell of the zygote totipotent meaning totally potent because it is the ancestor to all body cell types

Front 11

Pluripotent cells

Back 11

Prepotent sales are form cells that can produce many but not all kinds of cells if these early pluripotent cells that are commonly referred to as embryonic stem cells it is the embryonic stem cells that form the germ layers

Front 12

Multipotent stem cells

Back 12

Multipotent stencils as the haemopoiesis of cells found in the adult bone marrow can only produce if you type of cells adult stem cells are these multipotent cells are usually called are found in many tissues of the body

Front 13

Primary germ layers

Back 13

Early in the first trimester of pregnancy three layers of unique sales develop that embryologist call primary germ layers

Front 14

Endoderm

Back 14

The inner join later or endoderm four in the line into various tracks as well as several plans for example the lining of the respiratory tract and GI tract including some of the accessory structures such as tonsils is derived from the endoderm the lining of the pancreatic ducts hepatitic duck and urinary tract also have been endowed dermal origin the glandular epithelium of the farmer style roid and parathyroid glands are also drive from the endoderm

Front 15

Ectoderm

Back 15

The outer germ layer ectoderm focuses many of the structures around the periphery of the body for example the epidermis of the skin and animal of the teeth and cornea and land of the hour drive from the ectoderm besides these peripheral structures various components of the nervous system including the brain and the spinal cord

Front 16

Mesoderm

Back 16

The middle germ layer or methadone forms and most of the organs in the other structures between those formed by the endoderm and the ectoderm for example the dermis of the skin the schedule for muscles and bones many of the plans of the body kidneys go dancing components of the circulatory system are derived from the mesoderm

Front 17

Histogenesis

Back 17

The process by which the primary germ layers develop into many different kinds of tissues is called histogenesis the way these tissues arrange themselves in the organs is called organogenesis

Front 18

Histogenesis

Back 18

The process by which the primary during laters developed into many different kinds of tissues called histogenesis the way these arrange themselves in the organs is called organogenesis

Front 19

Early sex organ development

Back 19

The glans penis and clitoris warm from the glands the penis and the labia minora form from the urogenital folds in from the urethral groove the closed corpus spongiosum of the man and the vagina opening of the woman

Front 20

Partition

Back 20

Birth or partition is the point of transition between the prenatal and postnatal periods of life as the feet of signal the end of pregnancy uterus becomes irritable and ultimately mucuous muscular contractions begin and causes cervix to dilate does permitting the fetus to move from the uterus through the vaginal or birth canal to the exterior

Front 21

Delivery hormones several hormones help signal the time of Labor and promote the process needed for successful delivery high levels of cortisol at the end of pregnancy trip adult in HCG which in turn causes a drop and progesterone levels progesterone and releases since earlier in the pregnancy but at this point the break on the uterine muscle is released

Back 21

Delivery hormones

Front 22

stages of labor

Back 22

Labor the term used to describe the process results in the birth of the baby it is divided into three stages stage 1. From the uterine contractions until the dilation of the cervix is complete 10 centimeters stage 2. Of the time of maximal cervical dilation until the baby exit through the vagina stage 3 process of expulsion of the pool send it through the vagina